Álvarez-Castañeda, S. T., and P. Cortés-Calva. “Genetic Evaluation of the Baja California Rock Squirrel Otospermophilus Atricapillus (Rodentia: Sciuridae)”. Zootaxa, vol. 3138, no. 1, Dec. 2011, pp. 35–51, doi:10.11646/zootaxa.3138.1.2.