Kingston, Sarah E., Navarro-Sigüenza, Adolfo G., García-Trejo, Erick A., Vázquez-Miranda, Hernán, Fagan, William F., and Braun, Michael J. 2014. "Genetic differentiation and habitat connectivity across towhee hybrid zones in Mexico."
Evolutionary Ecology. 28 (2):277–297.
https://doi.org/10.1007/s10682-013-9673-8