@misc{Jan_z_Oświęcimia_(1443-1527)_Ioannes,
 author={Jan z Oświęcimia (1443-1527)},
 language={lat},
 type={Starodruk},
 title={Ioannes SACRANUS (Jan z Oświęcimia), Elucidarius errorum ritus Ruthenici. Kraków, Jan Haller, ca 1507.},
}