@misc{El-Helaly_Mohamed_Workplace,
 author={El-Helaly, Mohamed and Awadalla, Nabil and Mansour, Moheb and El-Biomy, Yousef},
 copyright={El-Helaly, Mohamed},
 copyright={Awadalla, Nabil},
 copyright={Mansour, Moheb},
 copyright={El-Biomy, Yousef},
 howpublished={online},
 publisher={Instytut Medycyny Pracy w Łodzi im. prof. J. Nofera},
 publisher={Polskie Towarzystwo Medycyny Pracy},
 language={eng},
 type={czasopismo - artykuł},
 type={dokument piśmienniczy},
 title={Workplace exposures and male infertility - a case-control study},
}