@Book{BVMC:623307, author = {Delvaulx, André}, title = {Paratitla siue Summaria et methodica explicatio Decretalium D. Gregorij papae IX}, url = {https://www.cervantesvirtual.com/obra/paratitla-siue-summaria-et-methodica-explicatio-decretalium-d-gregorij-papae-ix} }