Zangerl, R. & Case, G.R. (1973)
Iniopterygia: a new order of Chondrichthyan fishes from the Pennsylvanian of North America. Fieldiana Geology, Mem., 6, 1–67

Schnetz, L. & Dunne, E.M. & Feichtinger, I. & Butler, R.J. & Coates, M.I. & Sansom, I.J. (2024)
Rise and diversification of chondrichthyans in the Paleozoic. Paleobiology, in press
DOI: 10.1017/pab.2024.1