S.  Ressel and Schall, J. J., ?Parasites and showy males: malarial infection and color variation in fence lizards?, Oecologia, vol. 78, pp. 158?164, 1989.

J. J.  Schall and Ressel, S., ?Toxic plant compounds and the diet of the predominantly herbivorous whiptail lizard, Cnemidophorus arubensis?, Copeia, pp. 111-119, 1991.