@misc{Guzek_Wojciech_J._Occupational,
 author={Guzek, Wojciech J. and Sułkowski, Wiesław J.},
 copyright={Guzek, Wojciech J.},
 copyright={Sułkowski, Wiesław J.},
 howpublished={online},
 publisher={Nofer Institute of Occupational Medicine},
 publisher={Polish Association of Occupational Medicine},
 language={pol, eng},
 type={language document},
 type={serial - article},
 title={Occupational hearing loss: new principles of certification},
}