@Book{CCPB000115246-7, title = "Constituci\'{o}n de la monarquia espa\~{n}ola", author = "Espa\~{n}a", publisher = "Madrid : Imprenta Nacional", editor = "Imprenta Nacional", URL = "https://bvpb.mcu.es/es/consulta/registro.do?id=404112", year = "1845", }