R. Alexander Pyron; John J. Wiens (2011). "A large-scale phylogeny of Amphibia including over 2800 species, and a revised classification of extant frogs, salamanders, and caecilians". Molecular Phylogenetics and Evolution. 61 (2): 543–583. doi:10.1016/j.ympev.2011.06.012. PMID21723399.
R. Alexander Pyron; John J. Wiens (2011). "A large-scale phylogeny of Amphibia including over 2800 species, and a revised classification of extant frogs, salamanders, and caecilians". Molecular Phylogenetics and Evolution. 61 (2): 543–583. doi:10.1016/j.ympev.2011.06.012. PMID21723399.