@misc{Boczkowski_Andrzej._Professional,
 author={Boczkowski, Andrzej.},
 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={Professional competences in certification in occupational medicine as a subject of postgraduate training},
}