@misc{Regiomontanus_Johannes_(1436-1476)._Calendarium,,
 author={Regiomontanus, Johannes (1436-1476).},
 address={Augsburg},
 howpublished={online},
 publisher={Ratdolt, Erhard (1447-1527/28). Druk.},
 language={lat},
 type={tekst},
 title={Calendarium, Lat.},
 keywords={15 w., Kolekcje Piastowskie, inkunabuły, kalendarium},
}