@Book{BVMC:1134230, author = {Alfonso X, Rey de Castilla}, author = {Sancho IV, Rey de Castilla}, author = {Fernando III, Rey de Castilla, Santo}, title = {Crónica de tres reyes}, publisher = {Alicante : Biblioteca Virtual Miguel de Cervantes, 2021}, year = {2021}, url = {https://www.cervantesvirtual.com/obra/cronica-de-tres-reyes-1134230} }