Alexander Haas (2003): Phylogeny of frogs as inferred from primarily larval characters (Amphibia: Anura). Cladistics 19: 23–89. doi:10.1016/S0748-3007(03)00006-9
Kim Roelants & Franky Bossuyt (2005): Archaeobatrachian Paraphyly and Pangaean Diversification of Crown-Group Frogs. Systematic Biology 54(1): 111–126. doi:10.1080/10635150590905894
Rebecca Biton, Eli Geffen, Miguel Vences, Orly Cohen, Salvador Bailon, Rivka Rabinovich, Yoram Malka, Talya Oron, Renaud Boiste, Vlad Brumfeld, Sarig Gafny (2013): The rediscovered Hula painted frog is a living fossil. Nature Communications 4:1959. doi:10.1038/ncomms2959