LUND, R. (1989)
New petalodonts (Chondrichthyes) from the Upper Mississippian Bear Gulch Limestone (Namurian E2b) of Montana. Journal of Vertebrate Paleontology, 9 (3): 350–368
DOI: 10.1080/02724634.1989.10011767
GINTER, M. & HAMPE, O. & DUFFIN, C.J. (2010)
Handbook of Paleoichthyology, Vol. 3D: Chondrichthyes Paleozoic Elasmobranchii: Teeth Verlag Dr. Friedrich Pfeil, pp. 168, 154 fig., 4 Tab.
CIAMPAGLIO, C.N. & CICIMURRI, D.J. & DEUTER, L.H. & TAYLOR, M.A. (2012)
A review of the Chondrichthyans from the Mississippi System of Northern Alabama, USA. Bulletin of the Alabama Museum of Natural History, 28: 67–80