• [Wiki] http://en.wikipedia.org/wiki/Phrynosoma_douglasii.
• [EoL] http://eol.org/pages/2819760/details.
• [natmap] http://naturemappingfoundation.org/natmap/facts/short-horned_lizard_712.html.
• [idaho] http://idahoherps.pbworks.com/w/page/8133227/Phrynosoma douglasii44 Short-horned lizard.
• [Kooy2010] Kooijman, S. (2010). Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge.
• [Laht2010] Lahti, M. E. (2010). THE STATUS OF DWARFED POPULATIONS OF SHORT-HORNED LIZARDS (Phrynosoma hernandesi) AND GREAT PLAINS TOADS (Anaxyrus cognatus) IN THE SAN LUIS VALLEY, COLORADO. PhD thesis, Utah State University.
• [Mont1983] Montanucci, R. R. (1984). Breeding, captice care and longevity of the short-horned lizard Phrynosoma douglassi. Int. Zoo Yb., 23:148--156.