Naylor, G.J.P. & Aschliman, N. (2013)
How many species of living sharks, skates and rays are there, and how did they arise over the course of evolution? Proceeding of the International Symposium – Reproduction of Marine Life, Birth of New Life! Investigating the Mysteries of Reproduction, February 21–22, 2009: 5–12
McEachran, J.D. & Aschliman, N. (2004)
Phylogeny of Batoidea. In J.C. Carrier, J.A. Musick, & M.R. Heithaus (Eds.), Biology of Sharks and their Relatives (1th ed., pp. 79–113). CRC Press, Boca Raton, Florida