• [Wiki] http://en.wikipedia.org/wiki/Choloepus_didactylus.
• [AnAge] http://genomics.senescence.info/species/entry.php?species=Choloepus_didactylus.
• [HarpEyre2003] Harper, L., Eyre, S., Kibbey, C., and Partridge, J. P. (2003). Hand-rearing a two-toed sloth Choloepus didactylus at {Bristol Zoo Gardens}. Int. zoo Yb., 38:178--186.
• [Kooy2010] Kooijman, S. (2010). Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge.