Sever, David M.; Stanley E. Trauth. Cloacal Anatomy of Female Salamanders of the Plethodontid Subfamily Desmognathinae (Amphibia: Urodela). Transactions of the American Microscopical Society. April 1990, 109 (2): 193–204. JSTOR 3226814. doi:10.2307/3226814.
Sever, David M.; Stanley E. Trauth. Cloacal Anatomy of Female Salamanders of the Plethodontid Subfamily Desmognathinae (Amphibia: Urodela). Transactions of the American Microscopical Society. April 1990, 109 (2): 193–204. JSTOR 3226814. doi:10.2307/3226814.