• [Wiki] http://en.wikipedia.org/wiki/Lithobates_sphenocephalus.
• [amphibiaweb]
• [ErdmGodw2018] Erdmann, J. A., Godwin, C. D., Villalba-Guerra, M. R., Campbel, D. C., Donini, J., Parker, C. E., Rupp, A. E. E., Weyand, C. A., Partin, M. A., Borgardt, T., and Beachy, C. K. (2018). Larval life history of Lithobates sphenocephalus (southern leopard frog) in Southeast Louisiana. Southeastern Naturalist, 17(2):221--229.
• [HughMesh2017] Hughes, D. F., Walter E. Meshaka, J., and Delis, P. R. (2017). Reproduction and growth of the southern leopard frog, Lithobates sphenocephalus (Cope, 1886), in Virginia: implications for seasonal shifts in response to global climate change. Basic and Applied Herpetology, 31:17--31. doi:10.11160/bah.53.
• [Kooy2010] Kooijman, S. (2010). Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge.