@misc{Witelo_(ca_1230-ca_1280)_Book,
 author={Witelo (ca 1230-ca 1280)},
 copyright={Polska Akademia Nauk},
 address={Wrocław},
 howpublished={online},
 publisher={Ossolineum The Polish Academy of Sciences Press},
 language={eng},
 language={lat},
 type={książka},
 title={Book V of Witelo's Perspectiva},
 title={Perspectiva},
 title={Witelonis Perspectivae liber quintus = Book V of Witelo's Perspectiva},
}