2004
Aspects of the ecology of a distinct population of Xenosaurus platyceps from Querétaro, México, Julio A. Lemos-Espinal, Geoffrey R. Smith, and Royce E. Ballinger
2003
Ecology of Sceloporus undulatus speari (Sauria: Phrynosomatidae) from North-Central Chihuahua, Mexico, Julio A. Lemos-Espinal, Geoffrey R. Smith, Royce E. Ballinger, and Hobart M. Smith
1892
Catalogue of the Snakes of Nebraska With Notes on Their Habits and Distribution, W. Edgar Taylor
1891
The Ophidia of Nebraska, W. Edgar Taylor