@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={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={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={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},
}