HOGANSON, J.W. & ERICKSON, J.M. (2005)
A new species of Ischyodus (Chondrichthyes: Holocephali: Callorhynchidae) from Upper Maastrichtian shallow marine facies of the Fox Hills and Hell Creek formations, Williston Basin, North Dakota, USA. Palaeontology, 48 (4): 709–721
DOI: 10.1111/j.1475-4983.2005.00475.x
HOGANSON, J.W. & ERICKSON, M. & EVERHART, M.J. (2015)
Ischyodus rayhaasi (Chimaeroidei; Callorhynchidae) from the Campanian-Maastrichtian Fox Hills Formation of Northeastern Colorado, USA. Transactions of the Kansas Academy of Science, 118 (1–2): 27–40
DOI: 10.1660/062.118.0104
HOGANSON, J.W. & ERICKSON, M. & HOLLAND, F.D. (2019)
Chondrichthyan and Osteichthyan Paleofaunas from the Cretaceous (Late Maastrichtian) Fox Hills Formation of North Dakota, USA: Paleoecology, Paleogeography, and Extinction. Bulletins of American Paleontology, 398: 1-94