@Misc{BVMC:1147726, author = {Ostos Salcedo, Pilar}, title = {La cancillería de Alfonso VIII, rey de Castilla (1158-1214). Una aproximación}, publisher = {Alicante : Biblioteca Virtual Miguel de Cervantes, 2022}, year = {2022}, url = {https://www.cervantesvirtual.com/nd/ark:/59851/bmc1147726} }