Chang, H.-Y. & Sang, T.-K. & Jan, K.-Y. & Chen, C.T. (1995)
Cellular DNA Contents and Cell Volumes of Batoids. Copeia, 1995(3), 571–576

Asahida, T. & Ida, H. & Terashima, H. & Chang, H.-Y. (1993)
The karyotype and cellular DNA content of a ray, Mobula japonica. Japanese Journal of Ichthyology, 40(3), 317–322