Tolong jelaskan mengenai Silsilah dari Alifonso III dari Aragon

Alighieri, Dante, Purgatorio, Canto VII, l. 115ff.

Nelson, Lynn. The Chronicle of San Juan De LA Pena: A Fourteenth-Century Official History of the Crown of Aragon (University of Pennsylvania Press, 1991) ISBN 0-8122-1352-1

O'Callaghan, Joseph. A History of Medieval Spain (Cornell University Press, 1983) ISBN 0-8014-9264-5