• [Wiki] http://en.wikipedia.org/wiki/Sciurus_carolinensis.
• [AnAge] http://genomics.senescence.info/species/entry.php?species=Sciurus_carolinensis.
• [ADW] http://animaldiversity.org/accounts/Sciurus_carolinensis/.
• [Kooy2010] Kooijman, S. (2010). Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge.
• [ShorElt2009] Shorten, V. and Elton, C. (2009). Some aspects of the biology of the grey squirrel (Sciurus carolinensis) in Great Britain. Proceedings of the Zoological Society of London, 121(2):427–459. doi:10.1111/j.1096-3642.1951.tb00804.x.