• [Wiki] http://en.wikipedia.org/wiki/Urocitellus_elegans.
• [ADW] https://animaldiversity.org/accounts/Spermophilus_elegans/.
• [KoepHoff1981] Koeppl, J. W. and Hoffmann, R. S. (1981). Comparative postnatal growth of four ground squirrel species. Journal of Mammalogy, 62(1):41--57.
• [Kooy2010] Kooijman, S. (2010). Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge.