@Misc{BVMC:230878, author = {López Nieto, Juan C.}, author = {Maquieira, Marina}, title = {Uso y funciones de ser y estar en el "Libro de Buen Amor"}, publisher = {Alicante : Biblioteca Virtual Miguel de Cervantes, 2007}, year = {2007}, url = {https://www.cervantesvirtual.com/nd/ark:/59851/bmc64031} }