Wilkinson, M., D. San Mauro, E. Sherratt, and D. J. Gower. “A Nine-Family Classification of Caecilians (Amphibia: Gymnophiona)”. Zootaxa, vol. 2874, no. 1, May 2011, pp. 41–64, doi:10.11646/zootaxa.2874.1.3.