@Book{BVMC:243896, author = {Petrus Lombardus, Obispo de París}, title = {Sententiarum libri quattuor}, publisher = {Alicante : Biblioteca Virtual Miguel de Cervantes, 2003}, year = {2003}, url = {https://www.cervantesvirtual.com/nd/ark:/59851/bmcsj1h5} }