@misc{,
 volume={17},
 number={14},
 copyright={Creative Commons Attribution BY 4.0 license},
 journal={Polski Tygodnik Lekarski},
 howpublished={online},
 language={pol},
 type={Text},
 URL={http://www.rcin.org.pl/Content/80907/PDF/Poziom%20amoniaku.pdf},
}