• [Wiki] http://en.wikipedia.org/wiki/Gopherus_polyphemus.
• [ADW] http://animaldiversity.org/accounts/Gopherus_polyphemus/.
• [AnAge] http://genomics.senescence.info/species/entry.php?species=Gopherus_polyphemus.
• [ErnsBarb1989] Ernst, C. H. and Barbour, R. W. (1989). Turtles of the world. Smithsonian Institutiun Press, Washington.
• [Kooy2010] Kooijman, S. (2010). Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge.
• [MushWils1994] Mushinsky, J. H. R., Wilson, D. S., and McCoy, E. D. (1994). Growth and sexual dimorphism of gopherus polyphemus in central Florida. Herpetologica, 50(2):119--128.