@misc{Johannes_de_Sacrobosco_(około_1195-1256)_Algorithmus,
 author={Johannes de Sacrobosco (około 1195-1256)},
 address={Kraków},
 howpublished={online},
 publisher={Haller, Jan (ca 1467-1525). Druk.},
 language={lat},
 title={Algorithmus},
 type={stary druk},
}