Rapid range expansion in the Great Plains narrow-mouthed toad (Gastrophryne olivacea) and a revised taxonomy for North American microhylids Article
Streicher, Jeffrey W, Cox, Christian L, Campbell, Jonathan A et al. (2012). Rapid range expansion in the Great Plains narrow-mouthed toad (Gastrophryne olivacea) and a revised taxonomy for North American microhylids
. MOLECULAR PHYLOGENETICS AND EVOLUTION, 64(3), 645-653. 10.1016/j.ympev.2012.05.020