@misc{Balthasar_de_Porta_(_-ok._1500)._Autor_Expositio,
 author={Balthasar de Porta ( -ok. 1500). Autor},
 howpublished={online},
 publisher={impressa est per Melchiorem Lotter},
 language={lat},
 title={Expositio cano[n]is sacratissime misse},
}