BIGELOW, H.B. & SCHROEDER, W.C. (1965)
A further account of batoid fishes from the western Atlantic. Bulletin of the Museum of Comparative Zoology at Harvard College, 132 (5): 443–477, Pls. 1–2.
MCEACHRAN, J.D. & COMPAGNO, L.J.V. (1982)
Interrelationships of and within Breviraja based on anatomical structures (Pisces: Rajoidei). Bulletin of Marine Science, 32 (2): 399–425