#* Tim Halliday and Kraig Adler, ''Firefly Encyclopedia of Reptiles and Amphibians''
#* Robert Hofrichter, ''Amphibians: The World of Frogs, Toads, Salamanders and Newts''
#* Jennifer A. Clack, ''Gaining Ground: The Origin and Early Evolution of Tetrapods''
#* Hans-Peter Schultze & Linda Trueb, ''Origins of the Higher Groups of Tetrapods: Controversy and Consensus''
#* Jayne Parsons ''Dinosaur Encyclopedia''
#* Jeffrey B. Graham, ''Air-Breathing Fishes: Evolution, Diversity, and Adaptation''
#* Jennifer A. Clack (1997), ''Devonian tetrapod trackways and trackmakers; a review of the fossils and footprints'' Palaeogeog. Palaeoclimatol. Palaeoecol., 130: 227-250.
