@misc{Marek_Kazimierz_Principles,
 author={Marek, Kazimierz},
 copyright={Marek, Kazimierz},
 howpublished={online},
 publisher={Nofer Institute of Occupational Medicine},
 publisher={Polish Association of Occupational Medicine},
 language={pol, eng},
 type={serial - article},
 type={language document},
 title={Principles of work capacity assessment in occupational respiratory diseases},
}