@ARTICLE{
author={Zdravkov Alexander,Bechtel Achim,Stojanovic Ksenija A,Gross Doris,Weitz Johannes,Kojic Ivan D,Sachsenhofer Reinhard F,Misch David,Zivotic Dragana R},
year={2025},
title={Petrological and organic geochemical insights into the peat-forming environmental settings during the deposition of the early Oligocene Pirin coal deposit, SW Bulgaria},
journal={INTERNATIONAL JOURNAL OF COAL GEOLOGY},
volume={308},
number={},
pages={-},
document_type={Article},
} 

@ARTICLE{
author={Zdravkov Alexander,Gross Doris,Zivotic Dragana R,Kojic Ivan D,Stojanovic Ksenija A,Bechtel Achim},
year={2024},
title={Preliminary petrographic assessment of the suitability of Bobov Dol coals, SW Bulgaria for fluidized-bed coal gasification},
journal={SPISANIE NA B LGARSKOTO GEOLOGICHESKO DRUZHESTOV-REVIEW OF THE BULGARIAN GEOLOGICAL SOCIETY},
volume={85},
number={},
pages={79-84},
document_type={Article},
} 

@ARTICLE{
author={Kojic Ivan D,Novkovic Zeljana N,Stojanovic Ksenija A,Zivotic Dragana R,Bechtel Achim,Sachsenhofer Reinhard F},
year={2024},
title={Organic petrography and biomarker proxies of subbituminous coal from the Dubrava field (Aleksinac Basin, Serbia)},
journal={SPISANIE NA BALGARSKOTO GEOLOGICHESKO DRUZHESTOV-REVIEW OF THE BULGARIAN GEOLOGICAL SOCIETY},
volume={85},
number={},
pages={53-65},
document_type={Article},
} 

@ARTICLE{
author={Zdravkov Alexander,Gross Doris,Zivotic Dragana R,Kojic Ivan D,Stojanovic Ksenija A,Bechtel Achim},
year={2024},
title={Organic petrology as a tool for peat-forming environmental reconstructions: insights from Suhostrel and Bobov Dol coals, SW Bulgaria},
journal={SPISANIE NA B LGARSKOTO GEOLOGICHESKO DRUZHESTOV-REVIEW OF THE BULGARIAN GEOLOGICAL SOCIETY},
volume={85},
number={},
pages={41-46},
document_type={Article},
} 

@ARTICLE{
author={Liu Bangjun,Bechtel Achim,Stojanovic Ksenija A,Hower James C,Zhao Cunliang,Guo Xu},
year={2024},
title={Organic petrography, biomarkers, and stable isotope ( δ<SUP>13</SUP>C,δD,δ<SUP>15</SUP>N,δ<SUP>18</SUP>O) compositions of liptinite-rich coals},
journal={INTERNATIONAL JOURNAL OF COAL GEOLOGY},
volume={290},
number={},
pages={-},
document_type={Article},
} 

@ARTICLE{
author={Zdravkov Alexander,Bechtel Achim,Gross Doris,Kojic Ivan D,Stojanovic Ksenija A,Zivotic Dragana R},
year={2024},
title={Paleovegetation and environment during deposition of the Late Oligocene sub-bituminous coal in the Bobov Dol Basin (SW Bulgaria) as deduced from petrographic and geochemical characteristics},
journal={INTERNATIONAL JOURNAL OF COAL GEOLOGY},
volume={285},
number={},
pages={-},
document_type={Article},
} 

@ARTICLE{
author={Andric-Tomasevic Nevena,Simic Vladimir M,Zivotic Dragana R,Nikolic Nenad T,Pavlovic Aleksandra,Kluge Tobias,Beranoaguirre Aratz,Smit Jeroen,Bechtel Achim},
year={2024},
title={Tectonically induced travertine deposition in the Middle Miocene Levač intramountain basin (Central Serbia)},
journal={SEDIMENTOLOGY},
volume={71},
number={4},
pages={1214-1244},
document_type={Article},
} 

@ARTICLE{
author={Zdravkov Alexander,Gross Doris,Bechtel Achim,Stojanovic Ksenija A,Kojic Ivan D},
year={2023},
title={Depositional settings of the Eocene Suhostrel bituminous coal, SW Bulgaria, inferred from organic petrology and molecular proxies},
journal={INTERNATIONAL JOURNAL OF COAL GEOLOGY},
volume={276},
number={},
pages={-},
document_type={Article},
} 

@ARTICLE{
author={Kojic Ivan D,Bechtel Achim,Aleksic Nikoleta M,Zivotic Dragana R,Trifunovic Snezana S,Gajica Gordana D,Stojanovic Ksenija A},
year={2021},
title={Study of the Synergetic Effect of Co-Pyrolysis of Lignite and High-Density Polyethylene Aiming to Improve Utilization of Low-Rank Coal},
journal={POLYMERS},
volume={13},
number={5},
pages={-},
document_type={Article},
} 

@ARTICLE{
author={Nytoft Hans Peter,Kildahl-Andersen Geir,Lindstrom Sofie,Rise Frode,Bechtel Achim,Mitrovic Danica,Djokovic Natasa,Zivotic Dragana R,Stojanovic Ksenija A},
year={2019},
title={Dehydroicetexanes in sediments and crude oils: Possible markers for Cupressoideae},
journal={ORGANIC GEOCHEMISTRY},
volume={129},
number={},
pages={14-23},
document_type={Article},
} 

@ARTICLE{
author={Kojic Ivan D,Bechtel Achim,Kittinger Friedrich,Stevanovic Nikola R,Obradovic Marko O,Stojanovic Ksenija A},
year={2018},
title={Study of pyrolysis of high density polyethylene in the open system and estimation of its capability for co-pyrolysis with lignite},
journal={JOURNAL OF THE SERBIAN CHEMICAL SOCIETY},
volume={83},
number={7-8},
pages={923-940},
document_type={Article},
} 

@ARTICLE{
author={Djokovic Natasa,Mitrovic Danica,Zivotic Dragana R,Bechtel Achim,Sachsenhofer Reinhard F,Matic Vesna,Glamocanin Lidija,Stojanovic Ksenija A},
year={2018},
title={Petrographical and organic geochemical study of the lignite from the Smederevsko Pomoravlje field (Kostolac Basin, Serbia)},
journal={INTERNATIONAL JOURNAL OF COAL GEOLOGY},
volume={195},
number={},
pages={139-171},
document_type={Article},
} 

@ARTICLE{
author={Djokovic Natasa,Mitrovic Danica,Zivotic Dragana R,Bechtel Achim,Sachsenhofer Reinhard F,Stojanovic Ksenija A},
year={2018},
title={Petrographic and biomarker analysis of xylite-rich coal from the Kolubara and Kostolac lignite basins (Pannonian Basin, Serbia)},
journal={GEOLOGICA CARPATHICA},
volume={69},
number={1},
pages={51-70},
document_type={Article},
} 

@ARTICLE{
author={Bechtel Achim,Oberauer Klaus,Kostic Aleksandar,Gratzer Reinhard,Milisavljevic Vladimir,Aleksic Nikoleta M,Stojanovic Ksenija A,Gross Doris,Sachsenhofer Reinhard F},
year={2018},
title={Depositional environment and hydrocarbon source potential of the Lower Miocene oil shale deposit in the Aleksinac Basin (Serbia)},
journal={ORGANIC GEOCHEMISTRY},
volume={115},
number={},
pages={93-112},
document_type={Article},
} 

@ARTICLE{
author={Mitrovic Danica,Djokovic Natasa,Zivotic Dragana R,Bechtel Achim,Cvetkovic Olga G,Stojanovic Ksenija A},
year={2017},
title={Characterisation of lignite lithotypes from the "Kovin" deposit (Serbia) - Implications from petrographic, biomarker and isotopic analysis},
journal={JOURNAL OF THE SERBIAN CHEMICAL SOCIETY},
volume={82},
number={6},
pages={739-754},
document_type={Article},
} 

@ARTICLE{
author={Mitrovic Danica,Djokovic Natasa,Zivotic Dragana R,Bechtel Achim,Sajnovic Aleksandra M,Stojanovic Ksenija A},
year={2016},
title={Petrographical and organic geochemical study of the Kovin lignite deposit, Serbia},
journal={INTERNATIONAL JOURNAL OF COAL GEOLOGY},
volume={168},
number={},
pages={80-107},
document_type={Article},
} 

@ARTICLE{
author={Rundic Ljupko M,Vasic Nebojsa D,Zivotic Dragana R,Bechtel Achim,Knezevic Slobodan,Cvetkov Vesna},
year={2016},
title={The Pliocene Paludina Lake of Pannonian Basin: New Evidence from Northern Serbia},
journal={ANNALES SOCIETATIS GEOLOGORUM POLONIAE},
volume={86},
number={2},
pages={185-209},
document_type={Article},
} 

@ARTICLE{
author={Zivotic Dragana R,Bechtel Achim,Sachsenhofer Reinhard F,Gratzer Rainhard,Radic Dejan B,Obradovic Marko O,Stojanovic Ksenija A},
year={2015},
title={Petrological and organic geochemical properties of lignite from the Kolubara and Kostolac basins, Serbia: Implication on Grindability Index (Reprinted)},
journal={INTERNATIONAL JOURNAL OF COAL GEOLOGY},
volume={139},
number={},
pages={165-183},
document_type={Reprint},
} 

@ARTICLE{
author={Zivotic Dragana R,Bechtel Achim,Sachsenhofer Reinhard F,Gratzer Rainhard,Radic Dejan B,Obradovic Marko O,Stojanovic Ksenija A},
year={2014},
title={Petrological and organic geochemical properties of lignite from the Kolubara and Kostolac basins, Serbia: Implication on Grindability Index},
journal={INTERNATIONAL JOURNAL OF COAL GEOLOGY},
volume={131},
number={},
pages={344-362},
document_type={Article},
}