@misc{Avicenna_(980-1037)_Liber,
 author={Avicenna (980-1037) and http://viaf.org/viaf/89770781 and Rhazes (około 865-około 926) and http://viaf.org/viaf/95154093},
 howpublished={online},
 language={lat},
 type={text},
 title={Liber Canonis (De regula in arte medica)},
 title={Liber quartus Canonis: De febribus},
 title={Liber ad Almansorem. Pars nona},
 keywords={15 w., medycyna},
}