@misc{Zielonka_Tadeusz_M._Vaccination,
 author={Zielonka, Tadeusz M. and Lesiński, Jan and Życińska, Katarzyna and Machowicz, Rafał and Królikowski, Krzysztof and Wardyn, Andrzej K.},
 copyright={Zielonka, Tadeusz M.},
 copyright={Lesiński, Jan},
 copyright={Życińska, Katarzyna},
 copyright={Machowicz, Rafał},
 copyright={Królikowski, Krzysztof},
 copyright={Wardyn, Andrzej K.},
 howpublished={online},
 publisher={Nofer Institute of Occupational Medicine},
 publisher={Polish Association of Occupational Medicine},
 language={pol, eng},
 type={serial - article},
 type={language document},
 title={Vaccination against influenza in medical staff of Warsaw university hospitals and in students of Warsaw Medical University.},
}