Garman, S. (1913)
The Plagiostomia (Sharks, Skates and Rays). Memoirs of the Museum of Comparative Zoology at Harvard College, 36, 1–528
Clark, R.S. (1922)
Rays and skates (Raiae) No. 1. Egg capsules and young. Journal of the Marine Biological Association of the United Kingdom, 12(4), 577–643
DOI: 10.1017/S002531540000967X