Chichimecas" AcademyofAmericanFranciscanHistory, Vol 51, No. 1 (July 1994), p. 68 Powell, Phillip Wayne (1952), Soldiers, Indians & Silver, Berkeley: U of California
Americas: Essays on the Franciscan Family in North and South America (PDF). Berkeley, California, US: AcademyofAmericanFranciscanHistory. 2005: 119–142. ISBN 0-88382-306-3
Population of Southern Guatemala, 1549-1551: An Analysis of López de Cerrato's Tasaciones de Tributos". The Americas. AcademyofAmericanFranciscanHistory. 40
Origins of Medieval Institutions: Essays in Honor of Joseph F. O'Callaghan. Leiden: Brill. 1998: 61. ISBN 9004110968. McClure, Julia. The Franciscan Invention