@ARTICLE{
author={Apostolova Denitsa,Stojanovic Ksenija,Kostova Irena,Sachsenhofer Reinhard,Botoucharov Nikola},
year={2026},
title={Organic Geochemistry and Biomarker Characterization of Eocene Coal from the Burgas Basin},
journal={COMPTES RENDUS DE L ACADEMIE BULGARE DES SCIENCES},
volume={79},
number={8},
pages={1055-1065},
document_type={Article},
} 

@ARTICLE{
author={Apostolova Denitsa,Vukovic Nikola S,Sachsenhofer Reinhard,Stojanovic Ksenija A,Kostova Irena},
year={2024},
title={Geochemical study of biomarkers in Eocene coal from the Bourgas Basin},
journal={SPISANIE NA B LGARSKOTO GEOLOGICHESKO DRUZHESTOV-REVIEW OF THE BULGARIAN GEOLOGICAL SOCIETY},
volume={85},
number={},
pages={97-100},
document_type={Article},
}