Bruce Byland and John Pohl, In the Realm of Eight Deer: The Archaeology of the Mixtec Codices (Norman: University of Oklahoma Press, 1994) 73.
Bruce Byland and John Pohl, "The Identification of the Xipe Bundle-Red and White Bundle Place Sign in the Mixtec Codices,"Journal of Latin American Lore 19 (1996): 3-29.