Garman, S. (1913)
The Plagiostomia (Sharks, Skates and Rays).
Memoirs of the Museum of Comparative Zoology at Harvard College, 36, 1–528
Liu, F.-H. (1932)
The Elasmobranchiate fishes of north China.
The Science reports of National Tsing Hua University. Series B: Biological and psychological sciences, 1(5): 133–177, Pl. 1–6.