@Book{DGA20070171783, title = "El r\'{e}gim de la Confederaci\'{o} catalano-aragonesa a finals del segle XIII.", author = "KLUPFEL, L.", publisher = "Barcelona : [s. n.]", editor = "[s. n.]", URL = "https://derechoaragones.aragon.es/es/consulta/registro.do?id=602138", year = "1930", }