1. Archibald, J. D. 1977.Fossil Mammalia and Testudines of the Hell Creek Formation, and the geology of the Tullock and Hell Creek formations, Garfield County694 Unpublished Ph.D. dissertation, University of California, Berkeley
2. Anatomy and relationships of the turtleBoremys pulchra(Testudines: Baenidae)
3. The skull ofNeurankylus eximius(Testudines: Baenidae) and a reinterpretation of the relationships of this taxon