HUSSAKOF, L. & BRYANT, W.L. (1918)
Catalog of the fossil fishes in the Museum of the Buffalo Society of Natural Sciences. Bulletin of the Buffalo Society of Natural Sciences, 12: 1–346
MAISEY, J.G. (1983)
Some Pennsylvanian chondrichthyian spines from Nebraska. Transactions of the Nebraska Academy of Sciences, 11: 81–84