@misc{Jaga_Kushik_Letters,
 author={Jaga, Kushik},
 copyright={Jaga, Kushik},
 howpublished={online},
 publisher={Nofer Institute of Occupational Medicine},
 publisher={Polish Association of Occupational Medicine},
 language={eng},
 title={Letters to the editor},
 type={serial - article},
 type={language document},
}