@misc{Gratianus_Decreta,
 author={Gratianus},
 howpublished={online},
 publisher={Koberger, Anton},
 language={lat},
 type={inkunabuły},
 title={Decreta patrum sive concordia discordantium canonum Gratiani auctoris sive compilatoris cum apparatibus Iohannis ac additionibus Bartholomei Brixiensis},
}