@misc{Groszko_Marian_Polish,
 author={Groszko, Marian},
 copyright={Groszko, Marian},
 howpublished={online},
 publisher={Nofer Institute of Occupational Medicine},
 publisher={Polish Association of Occupational Medicine},
 language={pol, eng},
 type={language document},
 type={serial - article},
 title={Polish regulation on maximum admissible intensities for electric and magnetic frequencies of 50 Hz and the European Union recommendations for electrical power engineering},
}