@misc{Andrzejak_Ryszard_The,
 author={Andrzejak, Ryszard and Poręba, Rafał and Derkacz, Arkadiusz},
 copyright={Andrzejak, Ryszard},
 copyright={Poręba, Rafał},
 copyright={Derkacz, Arkadiusz},
 howpublished={online},
 publisher={Nofer Institute of Occupational Medicine},
 publisher={Polish Association of Occupational Medicine},
 language={pol, eng},
 type={language document},
 type={serial - article},
 title={The influence of chronic lead poisoning on heart rate variability parameters},
}