2 literature references:

Author: Crother, Brian I., Jeff Boundy, Frank T. Burbrink, et al. / Moriarty, John J., ed.
Year: 2008
Title: Scientific and Standard English Names of Amphibians and Reptiles of North America North of Mexico, With Comments Regarding Confidence in Our Understanding, Sixth Ed.
Source: Herpetological Circular No. 37
Author: Banks, R. C., R. W. McDiarmid, A. L. Gardner, and W. C. Starnes
Year: 2004
Title:
Source: Checklist of Vertebrates of the United States, the U.S. Territories, and Canada, draft (2004)