@Book{CCPB000115245-9, title = "Constituci\'{o}n de la monarqu\'{\i}a espa\~{n}ola", author = "Espa\~{n}a", publisher = "Madrid : [s.n.]", editor = "[s.n.]", URL = "https://bvpb.mcu.es/es/consulta/registro.do?id=404110", year = "1871", }