White, E.I. (1926)
Eocene fishes from Nigeria. Bulletin of the Geological Survey of Nigeria, 10, 1–82

Sahni, A. & Mehrotra, D.K. (1981)
The elasmobranch fauna of coastal Miocene sediments of peninsular India. Biological Memoirs Lucknow, 5(2), 83–121, 13 fig., pl. 1–3.