• [Wiki] http://en.wikipedia.org/wiki/Ascaphus_truei.
• [ADW] https://animaldiversity.org/accounts/Ascaphus_truei/.
• [amphibiaweb] https://amphibiaweb.org/cgi/amphib_query?rel-common_name=like&where-scientific_name=Ascaphus+truei.
• [AnAge] https://genomics.senescence.info/species/entry.php?species=Ascaphus_truei.
• [digitalatlas] https://digitalatlas.cose.isu.edu/bio/amph/anurans/astr/astrfram.htm.
• [DaugShel1982] Daugherty, C. H. and Sheldon, A. L. (1982). Age-determination, growth, and life history of a Montana population of the tailed frog (Ascaphus truei). Herpetologica, 38(4):461--468.
• [Kooy2010] Kooijman, S. (2010). Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge.