Garman, S. (1913)
The Plagiostomia (Sharks, Skates and Rays).
Memoirs of the Museum of Comparative Zoology at Harvard College, 36, 1–528
White, E.G. (1937)
Interrelationships of the elasmobranchs with a key to the Order Galea.
Bulletin of the American Museum of Natural History, 74, 25–138