Encina-Domínguez, J. A., A. Zárate-Lupercio, J. Valdés-Reyna, and J. A. Villarreal-Quintanilla. “Ecological Characterization and Diversity of the Oak Forests of the Sierra De Zapaliname, Coahuila, Mexico”. Botanical Sciences, no. 81, Dec. 2007, pp. 51 -63, doi:10.17129/botsci.1765.