Estes, R. (1964)
Fossil vertebrates from the Late Cretaceous Lance Formation, Eastern Wyoming. University of California Publications in Geological Sciences, 49, 1–180
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
Armstrong-Ziegler, J.G. (1978)
An aniliid snake and associated vertebrates from the Campanian of New Mexico. Journal of Paleontology, 52(2), 480–483
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
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
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
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