1. Ahrenfeldt RH (1955) Mating behaviour of Euproctus asper in captivity. Br J Herpetol 2:194–197
2. Amaya E, Ashurst JL, Bonfield JK, Croning MDR, Chen C-K, Davies RM, Francis MD, Garrett N, Gilchrist MJ, Grafham DV, McLaren SR, Papalopulu N, Rogers J, Smith JC, Taylor RG, Voigt J, Zorn AM (2006) Direct submission: nucleotide [Internet]. Bethesda (MD): National Library of Medicine (US), National Center for Biotechnology Information
3. [04 October 2006]-Accession No. CR761728.2, Xenopus tropicalis finished cDNA, clone TGas100l21 [cited 2018 January 14]. Available from: https://www.ncbi.nlm.nih.gov/nuccore/CR761728.2
4. Arnold SJ (1972) The evolution of courtship behaviour in salamanders (Doctoral dissertation). University of Michigan, Ann Arbor, Michigan, p 570
5. Arnold SJ (1977) The evolution of courtship behavior in new world salamanders with some comments on old world salamandrids. In: Taylor DH, Guttman SI (eds) The reproductive biology of amphibians. Plenum Press, New York, USA, pp 141–183