Phylogeography and monophyly of the swordtail fish species (Cyprinodontiformes, Poeciliidae)DOI: info:10.1111/j.1463-6409.2007.00311.xv. 37No. 2BLACKWELL PUBLISHING129–139
Gutiérrez-Rodríguez, C., Shearer, A. E., Morris, Molly R., and de Queiroz, Kevin. 2008. "Phylogeography and monophyly of the swordtail fish species Xiphophorus birchmanni (Cyprinodontiformes, Poeciliidae)." Zoologica Scripta, 37, (2) 129–139. https://doi.org/10.1111/j.1463-6409.2007.00311.x.