Axtell, R. W. 2009.  Elegant Earless Lizard. in L.L.C. Jones and R. E. Lovich Eds, Lizards of the American Southwest. Rio Nuevo Publishers. Tucson, AZ. pp.150-153.

Walker, J. M., Dixon, J. R., Axtell, R. W., and Cordes, J. E. 2009.  The taxonomic status of the inornate (unstriped) and ornate (striped) whiptail lizards (Aspidoscelis inornata [Baird]) from Coahuila and Nuévo Leon, México. Herpetological Review, 40 (3):276-282.

Axtell, R. W. 2005.  Interpretive Atlas of Texas Lizards. Anolis carolinensis (29), 22 pp.+ map. Uta stansburiana (30), 17 pp.+ map. Privately published.

Axtell, R. W. and H. M. Smith. 2004. Clarification of name usage for the Variable Skink, Eumeces multivirgatus epipleurotus. Southwestern Naturalist. 49 (1): 100.

Axtell, Ralph W.  2000. Interpretive Atlas of Texas Lizards. (22):  Eumeces multivirgatus epipleurotus.  6 pp.+ Map.  Privately published.

Smith, H. M., D. Chiszar, R. W. Axtell, and R. G. Webb.  1999.  Sceloporus undulatus speari Geographic Distribution.  Herpetological Review 30 (2).