Meisner, H. (2024)
Faszination Haie – Die Welt der fossilen und der lebenden Haie. Der Steinkern, 58, 1–116

Lucas, S.G. (2013)
Vertebrate biostratigraphy and biochronology of the upper Paleozoic Dunkard Group, Pennsylvania-West Virginia-Ohio, USA. International Journal of Coal Geology, 119, 79–87
DOI: 10.1016/j.coal.2013.04.007

May, W.J. & Hall, J.D. (2002)
Geology and Vertebrate Fauna of a New Site in the Wellington Formation (Lower Permian) of Northern Oklahoma. Oklahoma Geology Notes, 62(2), 63–66

Johnson, G.D. (1996)
Vertebrate Microfossils from the Lueders Formation, Albany Group, and the faunal transition from the Wichita Group into the Clear Fork Group, Lower Permian of Texas. Modern Geology, 20, 371–382

Cunningham, C.R. & Dickson, E.D. (1996)
Distributions of Kansas Permo-Carboniferous Vertebrate Assemblages as a Function of Wet and Dry Seasons. Transactions of the Kansas Academy of Science, 99(1/2), 16–28

Olson, E.C. (1989)
The Arroyo Formation (Leonardian: Lower Permian) and Its Vertebrate Fossils. Texas Memorial Museum Bulletin, 35: 30pp

Murry, P.A. & Johnson, G.D. (1987)
Clear Fork vertebrates and environments from the lower Permian of North-Central Texas. The Texas Journal of Science, 39(3): 253–266

Johnson, G.D. (1987)
Deformed xenacanthodiid shark teeth from the Permian of Texas. In Martin, J. E., and Ostrander, G. E. (Eds.), Papers in Vertebrate Paleontology Honoring Morton Green. Dakoterra, 3: 22–27

Schultze, H.-P. (1985)
Marine to onshore vertebrates in the Lower Permian of Kansas and their paleoenvironmental implications. The University of Kansas Paleontological Contributions, 113, 1–18