References for Alfonso Infante de Aragón

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A. de Fluvia: Genealogie. Enciclopedia Catalunia, Vol 4, S.#
W.K. v.Isenburg: Europäische Stammtafeln, Band II, Tafel 45. Marburg, 1953 (1965)
P. Litta: Famiglie Celebri Italiane, Vol. Supplement3, tab. 1. Milano, 19??
D.Schwennicke: Europäische Stammtafeln, Vol. II, Tafel 70. Marburg, 1984
S.de Vajay: From Alfonso VII to Alfonso X - The first two Centuries of the Burgundian Dynasty in Castile and Leon. 1989