@misc{Wiszniewska_Marta_Chronic,
 author={Wiszniewska, Marta and Walusiak, Jolanta and Wittczak, Tomasz and Pałczyński, Cezary},
 copyright={Nofer Institute of Occupational Medicine},
 howpublished={online},
 publisher={Nofer Institute of Occupational Medicine},
 publisher={Polish Association of Occupational Medicine},
 language={pol, eng},
 type={serial - article},
 type={language document},
 title={Chronic fatigue syndrome: its importance in occupational medicine},
}