TY  - JOUR
AU  - Stojanović, Ksenija A.
AU  - Šajnović, Aleksandra
AU  - Sabo, Tibor
AU  - Golovko, Anatoly
AU  - Jovančićević, Branimir
PY  - 2010
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/1103
AB  - The generative potential of a Neogene shale from Valjevo-Mionica Basin (Serbia) was investigated using conventional pyrolysis and pyrolysis in the presence of Pt(IV)- and Ru(III)-ions at temperatures 250 and 400 degrees C. Total liquid pyrolysate and hydrocarbon yields obtained in pyrolytic experiments, group composition of liquid pyrolysates, and distributions of saturated biomarkers and alkylaromatics in pyrolysates showed that the shale is in a catagenetic stage and may be a source of liquid hydrocarbons. It was estimated that similar shales found at a depth of 2300-2900 m would become active oil generating source rock where the minimum temperature necessary for catagenetic hydrocarbon generation is between 103 and 107 degrees C. The used metal ions, demonstrated significant positive effects on the yields of total liquid pyrolysate and corresponding hydrocarbons, at both temperatures 250 and 400 degrees C. Comparison of the results of alkylaromatics maturity parameters with maturity ratios calculated from distribution and abundance of saturated biomarkers showed that the metal ions had much greater influence on maturity changes on planar aromatic systems than on isomerizations in the molecules of polycyclic alkalies. The influence of Pt(IV)- and Ru(III)-ions on the distribution of saturated biomarkers in liquid pyrolysates is the same at both temperatures. The used metal ions have greater impact on kerogen degradation, which directly reflects on the increase in the quantity of hydrocarbons, than on isomerization reactions: moretanes -- gt  hopanes, hopanes -- gt  neohopanes and 5 alpha(H)14 alpha(H)17 alpha(H)20(R)-steranes -- gt  5 alpha(H)14 alpha(H)17 alpha(H)20(S)-steranes. Interactions between the used metal ions and aromatic systems during pyrolysis depend on temperature. Pt(IV)- and Ru(III)-ions demonstrated significant catalytic effect on maturation changes in both naphthalene and phenanthrene isomers during pyrolysis at 400 degrees C. Catalytic effects of Pt(IV)-ion on maturation changes in alkylnaphthalenes and Ru(III)-ion on maturation changes in alkylphenanthrenes were observed at 250 degrees C, which is caused by the different coordination properties of these metal ions.
PB  - Amer Chemical Soc, Washington
T2  - Energy and Fuels
T1  - Pyrolysis and Catalyzed Pyrolysis in the Investigation of a Neogene Shale Potential from Valjevo-Mionica Basin, Serbia
VL  - 24
IS  - 8
SP  - 4357
EP  - 4368
DO  - 10.1021/ef100466f
ER  - 

@article{
author = "Stojanović, Ksenija A. and Šajnović, Aleksandra and Sabo, Tibor and Golovko, Anatoly and Jovančićević, Branimir",
year = "2010",
abstract = "The generative potential of a Neogene shale from Valjevo-Mionica Basin (Serbia) was investigated using conventional pyrolysis and pyrolysis in the presence of Pt(IV)- and Ru(III)-ions at temperatures 250 and 400 degrees C. Total liquid pyrolysate and hydrocarbon yields obtained in pyrolytic experiments, group composition of liquid pyrolysates, and distributions of saturated biomarkers and alkylaromatics in pyrolysates showed that the shale is in a catagenetic stage and may be a source of liquid hydrocarbons. It was estimated that similar shales found at a depth of 2300-2900 m would become active oil generating source rock where the minimum temperature necessary for catagenetic hydrocarbon generation is between 103 and 107 degrees C. The used metal ions, demonstrated significant positive effects on the yields of total liquid pyrolysate and corresponding hydrocarbons, at both temperatures 250 and 400 degrees C. Comparison of the results of alkylaromatics maturity parameters with maturity ratios calculated from distribution and abundance of saturated biomarkers showed that the metal ions had much greater influence on maturity changes on planar aromatic systems than on isomerizations in the molecules of polycyclic alkalies. The influence of Pt(IV)- and Ru(III)-ions on the distribution of saturated biomarkers in liquid pyrolysates is the same at both temperatures. The used metal ions have greater impact on kerogen degradation, which directly reflects on the increase in the quantity of hydrocarbons, than on isomerization reactions: moretanes -- gt  hopanes, hopanes -- gt  neohopanes and 5 alpha(H)14 alpha(H)17 alpha(H)20(R)-steranes -- gt  5 alpha(H)14 alpha(H)17 alpha(H)20(S)-steranes. Interactions between the used metal ions and aromatic systems during pyrolysis depend on temperature. Pt(IV)- and Ru(III)-ions demonstrated significant catalytic effect on maturation changes in both naphthalene and phenanthrene isomers during pyrolysis at 400 degrees C. Catalytic effects of Pt(IV)-ion on maturation changes in alkylnaphthalenes and Ru(III)-ion on maturation changes in alkylphenanthrenes were observed at 250 degrees C, which is caused by the different coordination properties of these metal ions.",
publisher = "Amer Chemical Soc, Washington",
journal = "Energy and Fuels",
title = "Pyrolysis and Catalyzed Pyrolysis in the Investigation of a Neogene Shale Potential from Valjevo-Mionica Basin, Serbia",
volume = "24",
number = "8",
pages = "4357-4368",
doi = "10.1021/ef100466f"
}

Stojanović, K. A., Šajnović, A., Sabo, T., Golovko, A.,& Jovančićević, B.. (2010). Pyrolysis and Catalyzed Pyrolysis in the Investigation of a Neogene Shale Potential from Valjevo-Mionica Basin, Serbia. in Energy and Fuels
Amer Chemical Soc, Washington., 24(8), 4357-4368.
https://doi.org/10.1021/ef100466f

Stojanović KA, Šajnović A, Sabo T, Golovko A, Jovančićević B. Pyrolysis and Catalyzed Pyrolysis in the Investigation of a Neogene Shale Potential from Valjevo-Mionica Basin, Serbia. in Energy and Fuels. 2010;24(8):4357-4368.
doi:10.1021/ef100466f .

Stojanović, Ksenija A., Šajnović, Aleksandra, Sabo, Tibor, Golovko, Anatoly, Jovančićević, Branimir, "Pyrolysis and Catalyzed Pyrolysis in the Investigation of a Neogene Shale Potential from Valjevo-Mionica Basin, Serbia" in Energy and Fuels, 24, no. 8 (2010):4357-4368,
https://doi.org/10.1021/ef100466f . .

TY  - JOUR
AU  - Šajnović, Aleksandra
AU  - Stojanović, Ksenija A.
AU  - Jovančićević, Branimir
AU  - Golovko, Anatoly
PY  - 2009
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/605
AB  - Sediments from the Valjevo-Mionica Basin of Neogene age were investigated in this study using different geochemical methods. The results of the inorganic part analyses suggest that during genesis of the sediments, the contents of Na(2)O, B and As changed the most, which indicates that genesis of the investigated sediments was followed by climate changes and volcanic activity. The quantity of other macro- and microelements did not vary significantly. Investigations of the organic substance showed that it is native organic matter, which has been preserved to a significant extent, formed predominantly of algal precursor organisms, which provided good quality, deposited under reducing conditions and that it is at a low maturity level. As it has been established that genesis of the investigated sediments was mostly affected by an arid climate with more intensive salinity, the aim of this study, was also to identify the processes which were the most affected by the change in salinity, as well as biomarkers which are the most sensitive to this change. The results led to the conclusion that the salinity increase in the depositional environment had a primary effect on the preservation of the organic substance and the formation of the mineral searlesite. In addition, it was noticed that besides the Sq/nC(26) ratio, the parameters nC(17)/nC(27), CPI and Ph/nC(18), are also significantly sensitive to salinity change in a depositional environment in case of immature organic substance deposited under reducing conditions.
PB  - Springer, New York
T2  - Environmental Geology
T1  - Geochemical investigation and characterisation of Neogene sediments from Valjevo-Mionica Basin (Serbia)
VL  - 56
IS  - 8
SP  - 1629
EP  - 1641
DO  - 10.1007/s00254-008-1260-x
ER  - 

@article{
author = "Šajnović, Aleksandra and Stojanović, Ksenija A. and Jovančićević, Branimir and Golovko, Anatoly",
year = "2009",
abstract = "Sediments from the Valjevo-Mionica Basin of Neogene age were investigated in this study using different geochemical methods. The results of the inorganic part analyses suggest that during genesis of the sediments, the contents of Na(2)O, B and As changed the most, which indicates that genesis of the investigated sediments was followed by climate changes and volcanic activity. The quantity of other macro- and microelements did not vary significantly. Investigations of the organic substance showed that it is native organic matter, which has been preserved to a significant extent, formed predominantly of algal precursor organisms, which provided good quality, deposited under reducing conditions and that it is at a low maturity level. As it has been established that genesis of the investigated sediments was mostly affected by an arid climate with more intensive salinity, the aim of this study, was also to identify the processes which were the most affected by the change in salinity, as well as biomarkers which are the most sensitive to this change. The results led to the conclusion that the salinity increase in the depositional environment had a primary effect on the preservation of the organic substance and the formation of the mineral searlesite. In addition, it was noticed that besides the Sq/nC(26) ratio, the parameters nC(17)/nC(27), CPI and Ph/nC(18), are also significantly sensitive to salinity change in a depositional environment in case of immature organic substance deposited under reducing conditions.",
publisher = "Springer, New York",
journal = "Environmental Geology",
title = "Geochemical investigation and characterisation of Neogene sediments from Valjevo-Mionica Basin (Serbia)",
volume = "56",
number = "8",
pages = "1629-1641",
doi = "10.1007/s00254-008-1260-x"
}

Šajnović, A., Stojanović, K. A., Jovančićević, B.,& Golovko, A.. (2009). Geochemical investigation and characterisation of Neogene sediments from Valjevo-Mionica Basin (Serbia). in Environmental Geology
Springer, New York., 56(8), 1629-1641.
https://doi.org/10.1007/s00254-008-1260-x

Šajnović A, Stojanović KA, Jovančićević B, Golovko A. Geochemical investigation and characterisation of Neogene sediments from Valjevo-Mionica Basin (Serbia). in Environmental Geology. 2009;56(8):1629-1641.
doi:10.1007/s00254-008-1260-x .

Šajnović, Aleksandra, Stojanović, Ksenija A., Jovančićević, Branimir, Golovko, Anatoly, "Geochemical investigation and characterisation of Neogene sediments from Valjevo-Mionica Basin (Serbia)" in Environmental Geology, 56, no. 8 (2009):1629-1641,
https://doi.org/10.1007/s00254-008-1260-x . .

TY  - JOUR
AU  - Stojanović, Ksenija A.
AU  - Jovančićević, Branimir
AU  - Šajnović, Aleksandra
AU  - Sabo, Tibor
AU  - Vitorović, Dragomir K.
AU  - Schwarzbauer, Jan
AU  - Golovko, Anatoly
PY  - 2009
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/598
AB  - This paper is aimed at investigating the origin and geological history of the biodegraded Gaj (Serbia) crude oil, based on comparison of biomarkers, particularly alkylaromatics, in crude oil maltene fraction, with those in the liquid raw asphaltene pyrolysis products. The content of asphaltenes in crude oils being generally very low, expecting a higher yield of pyrolysate, pyrolysis of raw asphaltenes was also carried out in the presence of Pt(IV)- and Ru(III)-ions. The used metal ions demonstrated positive effects on the yields of total liquid pyrolysate and corresponding hydrocarbons. Occluded maltene and asphaltene pyrolysis products showed that metal ions had considerably stronger effect on maturation changes in naphthalene and phenanthrene rings than in polycyclic alkanes. The values of maturity parameters observed in maltenes and pyrolysates suggested this crude oil to have been expelled from the source before the "oil window" maximum. The investigated sample of the Gaj crude oil was shown to be in the 4th stage of bio-degradation scale and to have originated from source rocks poor in clays, most probably carbonates, with significant contribution of algae to oil precursor biomass, deposited under a stratified saline water column. (C) 2008 Elsevier Ltd. All rights reserved.
PB  - Elsevier Sci Ltd, Oxford
T2  - Fuel
T1  - Pyrolysis and Pt(IV)- and Ru(III)-ion catalyzed pyrolysis of asphaltenes in organic geochemical investigation of a biodegraded crude oil (Gaj, Serbia)
VL  - 88
IS  - 2
SP  - 287
EP  - 296
DO  - 10.1016/j.fuel.2008.09.014
ER  - 

@article{
author = "Stojanović, Ksenija A. and Jovančićević, Branimir and Šajnović, Aleksandra and Sabo, Tibor and Vitorović, Dragomir K. and Schwarzbauer, Jan and Golovko, Anatoly",
year = "2009",
abstract = "This paper is aimed at investigating the origin and geological history of the biodegraded Gaj (Serbia) crude oil, based on comparison of biomarkers, particularly alkylaromatics, in crude oil maltene fraction, with those in the liquid raw asphaltene pyrolysis products. The content of asphaltenes in crude oils being generally very low, expecting a higher yield of pyrolysate, pyrolysis of raw asphaltenes was also carried out in the presence of Pt(IV)- and Ru(III)-ions. The used metal ions demonstrated positive effects on the yields of total liquid pyrolysate and corresponding hydrocarbons. Occluded maltene and asphaltene pyrolysis products showed that metal ions had considerably stronger effect on maturation changes in naphthalene and phenanthrene rings than in polycyclic alkanes. The values of maturity parameters observed in maltenes and pyrolysates suggested this crude oil to have been expelled from the source before the "oil window" maximum. The investigated sample of the Gaj crude oil was shown to be in the 4th stage of bio-degradation scale and to have originated from source rocks poor in clays, most probably carbonates, with significant contribution of algae to oil precursor biomass, deposited under a stratified saline water column. (C) 2008 Elsevier Ltd. All rights reserved.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Fuel",
title = "Pyrolysis and Pt(IV)- and Ru(III)-ion catalyzed pyrolysis of asphaltenes in organic geochemical investigation of a biodegraded crude oil (Gaj, Serbia)",
volume = "88",
number = "2",
pages = "287-296",
doi = "10.1016/j.fuel.2008.09.014"
}

Stojanović, K. A., Jovančićević, B., Šajnović, A., Sabo, T., Vitorović, D. K., Schwarzbauer, J.,& Golovko, A.. (2009). Pyrolysis and Pt(IV)- and Ru(III)-ion catalyzed pyrolysis of asphaltenes in organic geochemical investigation of a biodegraded crude oil (Gaj, Serbia). in Fuel
Elsevier Sci Ltd, Oxford., 88(2), 287-296.
https://doi.org/10.1016/j.fuel.2008.09.014

Stojanović KA, Jovančićević B, Šajnović A, Sabo T, Vitorović DK, Schwarzbauer J, Golovko A. Pyrolysis and Pt(IV)- and Ru(III)-ion catalyzed pyrolysis of asphaltenes in organic geochemical investigation of a biodegraded crude oil (Gaj, Serbia). in Fuel. 2009;88(2):287-296.
doi:10.1016/j.fuel.2008.09.014 .

Stojanović, Ksenija A., Jovančićević, Branimir, Šajnović, Aleksandra, Sabo, Tibor, Vitorović, Dragomir K., Schwarzbauer, Jan, Golovko, Anatoly, "Pyrolysis and Pt(IV)- and Ru(III)-ion catalyzed pyrolysis of asphaltenes in organic geochemical investigation of a biodegraded crude oil (Gaj, Serbia)" in Fuel, 88, no. 2 (2009):287-296,
https://doi.org/10.1016/j.fuel.2008.09.014 . .

TY  - JOUR
AU  - Stojanović, Ksenija A.
AU  - Jovančićević, Branimir
AU  - Vitorović, Dragomir K.
AU  - Golovko, Yulia
AU  - Pevneva, Galina
AU  - Golovko, Anatoly
PY  - 2007
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/903
AB  - Twenty three crude oils from the Serbian part of the Pannonian Basin (14 from the Vojvodina Province and 9 from the Drmno Depression) were investigated, aimed at an evaluation of oil-oil maturity correlation parameters based on the distribution and abundance of saturated biomarkers and alkylarene constituents. Factor and cluster analyses were used for this purpose. Factor analyses using varimax rotation were first run separately, i.e., of maturity parameters based on the abundance of (a) n-alkanes and isoprenoids, (b) steranes and triterpanes, (c) alkylnaphthalenes, and (d) alkylphenanthrenes. These analyses yielded 9 important "maturity factors". Eight of them, showing higher than 30 % of variance, were further involved in another factor analysis, as well as in cluster analysis using the Ward method. In this way, all maturity parameters based on saturated biomarkers and alkylarenes were evaluated and ranged, considering the fact that the observed factors represented their linear combinations. The results showed that in the correlation of crude oils from the Serbian part of the Pannonian Basin, the most important were maturity parameters based on isomerization reactions involving one methyl group in thermodynamically less stable alpha-methylnaphthalenes, ethylnaphthalenes, dimethylnaphthalenes and methylphenanthrenes, and their change into more stable isomers with the methyl group in the beta-position in the aromatic ring. Processes constituting high loadings factor 2 and factor 3 parameters were also defined. Hierarchy between the "factors" and parameters were controlled, and approved, by cluster analysis using the Ward method. Finally, the investigated crude oils were correlated by factor and cluster analyses, using all the important "maturity factors". Differences in maturity were observed between the Vojvodina and Drmno Depression crude oils, as well as between oils originating from South Banat, North Banat and the Velebit oil field (Vojvodina locality).
PB  - Serbian Chemical Soc, Belgrade
T2  - Journal of the Serbian Chemical Society
T1  - Evaluation of saturated and aromatic hydrocarbons oil-oil maturity correlation parameters (SE Pannonian Basin, Serbia)
VL  - 72
IS  - 12
SP  - 1237
EP  - 1254
DO  - 10.2298/JSC0712237S
ER  - 

@article{
author = "Stojanović, Ksenija A. and Jovančićević, Branimir and Vitorović, Dragomir K. and Golovko, Yulia and Pevneva, Galina and Golovko, Anatoly",
year = "2007",
abstract = "Twenty three crude oils from the Serbian part of the Pannonian Basin (14 from the Vojvodina Province and 9 from the Drmno Depression) were investigated, aimed at an evaluation of oil-oil maturity correlation parameters based on the distribution and abundance of saturated biomarkers and alkylarene constituents. Factor and cluster analyses were used for this purpose. Factor analyses using varimax rotation were first run separately, i.e., of maturity parameters based on the abundance of (a) n-alkanes and isoprenoids, (b) steranes and triterpanes, (c) alkylnaphthalenes, and (d) alkylphenanthrenes. These analyses yielded 9 important "maturity factors". Eight of them, showing higher than 30 % of variance, were further involved in another factor analysis, as well as in cluster analysis using the Ward method. In this way, all maturity parameters based on saturated biomarkers and alkylarenes were evaluated and ranged, considering the fact that the observed factors represented their linear combinations. The results showed that in the correlation of crude oils from the Serbian part of the Pannonian Basin, the most important were maturity parameters based on isomerization reactions involving one methyl group in thermodynamically less stable alpha-methylnaphthalenes, ethylnaphthalenes, dimethylnaphthalenes and methylphenanthrenes, and their change into more stable isomers with the methyl group in the beta-position in the aromatic ring. Processes constituting high loadings factor 2 and factor 3 parameters were also defined. Hierarchy between the "factors" and parameters were controlled, and approved, by cluster analysis using the Ward method. Finally, the investigated crude oils were correlated by factor and cluster analyses, using all the important "maturity factors". Differences in maturity were observed between the Vojvodina and Drmno Depression crude oils, as well as between oils originating from South Banat, North Banat and the Velebit oil field (Vojvodina locality).",
publisher = "Serbian Chemical Soc, Belgrade",
journal = "Journal of the Serbian Chemical Society",
title = "Evaluation of saturated and aromatic hydrocarbons oil-oil maturity correlation parameters (SE Pannonian Basin, Serbia)",
volume = "72",
number = "12",
pages = "1237-1254",
doi = "10.2298/JSC0712237S"
}

Stojanović, K. A., Jovančićević, B., Vitorović, D. K., Golovko, Y., Pevneva, G.,& Golovko, A.. (2007). Evaluation of saturated and aromatic hydrocarbons oil-oil maturity correlation parameters (SE Pannonian Basin, Serbia). in Journal of the Serbian Chemical Society
Serbian Chemical Soc, Belgrade., 72(12), 1237-1254.
https://doi.org/10.2298/JSC0712237S

Stojanović KA, Jovančićević B, Vitorović DK, Golovko Y, Pevneva G, Golovko A. Evaluation of saturated and aromatic hydrocarbons oil-oil maturity correlation parameters (SE Pannonian Basin, Serbia). in Journal of the Serbian Chemical Society. 2007;72(12):1237-1254.
doi:10.2298/JSC0712237S .

Stojanović, Ksenija A., Jovančićević, Branimir, Vitorović, Dragomir K., Golovko, Yulia, Pevneva, Galina, Golovko, Anatoly, "Evaluation of saturated and aromatic hydrocarbons oil-oil maturity correlation parameters (SE Pannonian Basin, Serbia)" in Journal of the Serbian Chemical Society, 72, no. 12 (2007):1237-1254,
https://doi.org/10.2298/JSC0712237S . .

TY  - JOUR
AU  - Stojanović, Ksenija A.
AU  - Jovančićević, Branimir
AU  - Vitorović, Dragomir K.
AU  - Golovko, Julia
AU  - Pevneva, Galina
AU  - Golovko, Anatoly
PY  - 2007
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/822
AB  - Hierarchy of triterpane, sterane, naphthalene and phenanthrene maturation parameters in oil-source rock correlations (Drinno depression, southeastern part of the Pannonian Basin, Serbia and Montenegro) was evaluated. Different triterpane and sterane parameters were found to be very similar in all investigated samples. Phenanthrene and naphthalene maturation parameters demonstrated much less uniformity, and thus higher applicability. In order to establish a detailed hierarchy of these maturation parameters, the factor analysis was used. Parameters based on isomerization reactions (alpha - gt beta) of methylnaphthatenes and methylphenanthrenes, having high loadings, defined the statistically most significant factor 1. Parameters based on dealkylation processes of dimethyl- and trimethylphenanthrenes into methylphenanthrenes, having extremely high loadings values, determined factor 2. In the last significant, factor 3, high loadings were observed with triterpane and sterane parameters. The factor analysis involving just the phenanthrene and naphthalene isomerization parameters, classified methylphenanthrene isomerization parameters into factor 1. Among the naphthalene isomerization maturation parameters a certain hierarchy was also observed, which depended on whether the parameters represented isomer ratios which differed on the position of one or two alkyl groups. General conclusion based on factor analysis is in agreement with theoretical presumptions concerning the transformations of phenanthrene and naphthalene isomers. (c) 2006 Elsevier B.V. All rights reserved.
PB  - Elsevier Science Bv, Amsterdam
T2  - Journal of Petroleum Science and Engineering
T1  - Hierarchy of maturation parameters in oil-source rock correlations. case study: Drmno depression, southeastern Pannonian Basin, Serbia and Montenegro
VL  - 55
IS  - 3-4
SP  - 237
EP  - 251
DO  - 10.1016/j.petrol.2006.07.009
ER  - 

@article{
author = "Stojanović, Ksenija A. and Jovančićević, Branimir and Vitorović, Dragomir K. and Golovko, Julia and Pevneva, Galina and Golovko, Anatoly",
year = "2007",
abstract = "Hierarchy of triterpane, sterane, naphthalene and phenanthrene maturation parameters in oil-source rock correlations (Drinno depression, southeastern part of the Pannonian Basin, Serbia and Montenegro) was evaluated. Different triterpane and sterane parameters were found to be very similar in all investigated samples. Phenanthrene and naphthalene maturation parameters demonstrated much less uniformity, and thus higher applicability. In order to establish a detailed hierarchy of these maturation parameters, the factor analysis was used. Parameters based on isomerization reactions (alpha - gt beta) of methylnaphthatenes and methylphenanthrenes, having high loadings, defined the statistically most significant factor 1. Parameters based on dealkylation processes of dimethyl- and trimethylphenanthrenes into methylphenanthrenes, having extremely high loadings values, determined factor 2. In the last significant, factor 3, high loadings were observed with triterpane and sterane parameters. The factor analysis involving just the phenanthrene and naphthalene isomerization parameters, classified methylphenanthrene isomerization parameters into factor 1. Among the naphthalene isomerization maturation parameters a certain hierarchy was also observed, which depended on whether the parameters represented isomer ratios which differed on the position of one or two alkyl groups. General conclusion based on factor analysis is in agreement with theoretical presumptions concerning the transformations of phenanthrene and naphthalene isomers. (c) 2006 Elsevier B.V. All rights reserved.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Journal of Petroleum Science and Engineering",
title = "Hierarchy of maturation parameters in oil-source rock correlations. case study: Drmno depression, southeastern Pannonian Basin, Serbia and Montenegro",
volume = "55",
number = "3-4",
pages = "237-251",
doi = "10.1016/j.petrol.2006.07.009"
}

Stojanović, K. A., Jovančićević, B., Vitorović, D. K., Golovko, J., Pevneva, G.,& Golovko, A.. (2007). Hierarchy of maturation parameters in oil-source rock correlations. case study: Drmno depression, southeastern Pannonian Basin, Serbia and Montenegro. in Journal of Petroleum Science and Engineering
Elsevier Science Bv, Amsterdam., 55(3-4), 237-251.
https://doi.org/10.1016/j.petrol.2006.07.009

Stojanović KA, Jovančićević B, Vitorović DK, Golovko J, Pevneva G, Golovko A. Hierarchy of maturation parameters in oil-source rock correlations. case study: Drmno depression, southeastern Pannonian Basin, Serbia and Montenegro. in Journal of Petroleum Science and Engineering. 2007;55(3-4):237-251.
doi:10.1016/j.petrol.2006.07.009 .

Stojanović, Ksenija A., Jovančićević, Branimir, Vitorović, Dragomir K., Golovko, Julia, Pevneva, Galina, Golovko, Anatoly, "Hierarchy of maturation parameters in oil-source rock correlations. case study: Drmno depression, southeastern Pannonian Basin, Serbia and Montenegro" in Journal of Petroleum Science and Engineering, 55, no. 3-4 (2007):237-251,
https://doi.org/10.1016/j.petrol.2006.07.009 . .