Ishiyama, R. (1958)
Studies on the rajid fishes (Rajidae) found in the waters around Japan. Journal of the Shimonoseki College of Fisheries, 7(2/3), 193–394

Ishiyama, R. (1967)
Fauna Japonica. Rajidae (Pisces). Biogeographical Society of Japan (Tokyo): i–vi, 1–82