@Misc{BVMC:253253, author = {Martínez Torrón, Diego}, title = {Variantes poemáticas de "Piedra y cielo" : de la Segunda Antolojía a Leyenda}, publisher = {Alicante : Biblioteca Virtual Miguel de Cervantes, 2008}, year = {2008}, url = {https://www.cervantesvirtual.com/nd/ark:/59851/bmcgm8p4} }