↑ Seward, Desmond (1978). Eleanor of Aquitaine: The Mother Queen. New York: Dorset Press. p. 233. ISBN 0-88029-055-2.
↑ H. Salvador Martínez, Alfonso X, the Learned: A Biography, page 29
↑ Roderici Toletani Archiepiscopi De Rebus Hispaniæ
↑ Shadis, Miriam (2010). Berenguela of Castile (1180–1246) and Political Women in the High Middle Ages. Palgrave Macmillan. p. 4. ISBN 978-0-312-23473-7.
