@Misc{BVMC:260909, author = {Alfonso X, Rey de Castilla}, title = {Divi Alphonsi romanorum et hispaniarum regis, astronomicae tabulae in propriam integritatem restitutae....}, publisher = {Alicante : Biblioteca Virtual Miguel de Cervantes, 2009}, year = {2009}, url = {https://www.cervantesvirtual.com/nd/ark:/59851/bmcxg9r6} }