(en) P. J. Bakewell, Silver Mining and Society in Colonial Zacatecas 1546–1700, Cambridge: University Press, (lire en ligne), p. 28–29
(en) John Francis Bannon, The Spanish Borderlands Frontier 1513–1821, Albuquerque, Albuquerque: University of New Mexico Press, (lire en ligne), p. 29, 53–54