Montgomery, H. & Clark, S. (2016)
Paleoecology of the Gaddis site in the Upper Cretaceous Aguja Formation, Terlingua, Texas. Palaios, 31(7), 347–357
DOI: 10.2110/palo.2015.099

Pearson, D.A. & Schaefer, T. & Johnson, K.R. & Nichols, D.J. & Hunter, J.P. (2002)
Vertebrate biostratigraphy of the Hell Creek Formation in southwestern North Dakota and northwestern South Dakota. Geological Society of America Special Paper, 361, 145–167

Rowe, T. & Cifelli, R.L. & Lehman, T.M. & Weil, A. (1992)
The Campanian Terlingua local fauna, with a summary of other vertebrates from the Aguja Formation, Trans-Pecos Texas. Journal of Vertebrate Paleontology, 12(4), 472–493
DOI: 10.1080/02724634.1992.10011475

Bryant, L.J. (1989)
Non-dinosaurian lower vertebrates across the Cretaceous-Tertiary boundary in northeastern Montana. University of California Publications in Geological Sciences, 134, 1–107

Armstrong-Ziegler, J.G. (1978)
An aniliid snake and associated vertebrates from the Campanian of New Mexico. Journal of Paleontology, 52(2), 480–483

Langston, W. (1970)
A Late Cretaceous vertebrate fauna from the St. Marys River Formation in Western Canada. Royal Ontario Museum Life Sciences Miscellaneous Publications, 114–133

Estes, R. (1964)
Fossil vertebrates from the Late Cretaceous Lance Formation, Eastern Wyoming. University of California Publications in Geological Sciences, 49, 1–180