Jordan, D.S. & Hannibal, H. (1923)
Fossil sharks and rays of the Pacific slope of North America. Bulletin of the Southern California Academy of Sciences, 22, 27–63, pl. 1–10
Cuny, G. & Guinot, G. & Enault, S. (2017)
4 - Enameloid Microstructure in Rays In Evolution of Dental Tissues and Paleobiology in Selachians, ISTE Press Ltd. Published by Elsevier Ltd.: 47-59
DOI: 10.1016/B978-1-78548-139-0.50004-3