@misc{Balthasar_de_Porta_(_–_c._1500)_Expositio,
 author={Balthasar de Porta ( – c. 1500)},
 howpublished={online},
 publisher={Gregorius Böttiger},
 language={lat},
 type={inkunabuł},
 title={Expositio canonis missae},
}