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: Carrier, J.C. & Musick, J.A. & Heithaus, M.R. (eds) Biology of Sharks and their Relatives, Chapter 3: 79–113