@Book{BVMC:623157, author = {Iglesia Católica. Papa}, title = {Summa constitutionum summorum pontificum et rerum in ecclesia Romana gestarum à Gregorio IX, vsque ad Sixtum V}, url = {https://www.cervantesvirtual.com/obra/summa-constitutionum-summorum-pontificum-et-rerum-in-ecclesia-romana-gestarum-a-gregorio-ix-vsque-ad-sixtum-v-1} }