• [Wiki] http://en.wikipedia.org/wiki/Rangifer_tarandus.
• [AnAge] http://genomics.senescence.info/species/entry.php?species=Rangifer_tarandus.
• [ADW] http://animaldiversity.org/accounts/Rangifer_tarandus/.
• [KnotBarb2005] Knott, K. K., Barboza, P. S., and Bowyer, R. T. (2005). Growth in arctic ungulates: Postnatal development and organ maturation in Rangifer tarandus and Ovibos moschatus. J. Mammal., 86:121--130.
• [Kooy2010] Kooijman, S. (2010). Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge.