Herbermann, Charles, ed. (1913). "Spain" . Catholic Encyclopedia. New York: Robert Appleton Company. This article incorporates text from this source, which is in the public domain.
Keller, John E. (2015). Daily life depicted in the Cantigas de Santa Maria. Cash, Annette Grant, 1943–. Lexington: University Press of Kentucky. p. 31. ISBN9780813159096. OCLC900344519.