@misc{Konieczko_Katarzyna_Petroleum,
 author={Konieczko, Katarzyna},
 copyright={Nofer Institute of Occupational Medicine},
 howpublished={online},
 publisher={Nofer Institute of Occupational Medicine},
 publisher={Polish Association of Occupational Medicine},
 language={pol, eng},
 type={language document},
 type={serial - article},
 title={Petroleum substances - human health hazards. 1: Classification of petroleum substances on the list of dangerous substances and assessment of existing hazards},
}