• [Wiki] http://en.wikipedia.org/wiki/Sigmodon_ochrognathus.
• [AnAge] https://genomics.senescence.info/species/entry.php?species=Sigmodon_hispidus.
• [Hoff1963] Hoffmeister, D. F. (1963). The yellow-nosed cotton rat, Sigmodon ochrognathus, in Arizona. The American Midland Naturalist, 70(2):429--441.
• [Kooy2010] Kooijman, S. (2010). Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge.