Williston, S.W. (1900)
Some fish teeth from the Kansas Cretaceous. Kansas University Quarterly, 9(1): 27–42, pl. 6–14.
Williston, S.W. (1900)
Cretaceous fishes. Selachians and Ptychodonts. University Geological Survey of Kansas, 6(2): 237–256, pl. 24–32.
Hay, O.P. (1902)
Bibliography and catalogue of the fossil Vertebrata of North America. Bulletin of the United States Geological and Geographical Survey of the Territories, 179, 1–868
Reinhart, R.H. (1951)
A new shark of the family Ptychodontidae from South America. University of California Publications in Geological Sciences, 28(8), 195–202
Schultze, H.-P. & Stewart, J.D. & Neuner, A.M. & Coldiron, R.W. (1982)
Type and figured specimens of fossil vertebrates in the collection of the University of Kansas Museum of Natural History. Part I. Fossil Fishes. University of Kansas, Museum of Natural History, Miscellaneous Publication, 73: 1–53
Everhart, M.J. & Caggiano, T. & Shimada, K. (2003)
Note on the occurrence of five species of ptychodontid sharks from a single locality in the Smoky Hill Chalk (Late Cretaceous) of western Kansas [Abstract]. Kansas Academy of Science, Abstracts 22: 29
Hamm, S.A. & Shimada, K. (2004)
A Late Cretaceous durophagus shark, Ptychodus martini Williston, from Texas. Texas Journal of Science, 56(3), 215–222
Shimada, K. & Cicimurri, D.J. (2006)
Annotated checklist of fossil fishes from the Smoky Hill Chalk of the Niobrara Chalk (Upper Cretaceous) in Kansas. New Mexico Museum of Natural History and Science, Bulletin, 35, 193–213
Hamm, S.A. (2008)
Systematic, stratigraphic, geographic, and paleoecological distribution of the Late Cretaceous shark genus Ptychodus within the Western Interior Seaway. Unpublished MS thesis, University of Texas, Dallas, 434 pp
Hamm, S.A. (2009)
New Data on the Occurrence and Distribution of Ptychodus from the Upper Cretaceous (Coniacian-Santonian) of Texas . Dallas Paleontological Society, Occasional Papers, 8: 1–31
Hamm, S.A. & Cicimurri, D.J. (2011)
Early coniacian (late cretaceous) selachian fauna from the basal Atco Formation, lower Austin Group, north central Texas. Paludicola, 8(3), 107–127
Hamm, S.A. (2020)
Stratigraphic, Geographic, and Paleoecological Distribution of the Late Cretaceous Shark Genus Ptychodus within the Western Interior Seaway, North America. New Mexico Museum of Natural History and Science, Bulletin, 81, 1–94