Takahashi, A. & Itoh, T. & Nakanishi, A. & Amemiya, Y. & Ida, H. & Meguro, H. & Kawauchi, H. (2004)
Molecular cloning of proopiomelanocortin cDNA in the ratfish, a holocephalan. General and Comparative Endocrinology, 135(1), 159–165
DOI: 10.1016/j.ygcen.2003.08.007
Homma, K. & Maruyama, T. & Itoh, T. & Ishihara, H. & Uchida, S. (1999)
Biology of the manta ray, Manta birostris Walbaum in the Indo-Pacific. In Seret, B. and Sire, J.Y. (Eds) Indo-Pacific fish biology: Proceedings of the 5th Indo-Pacific Fisheries Conference, Noumea, 1997. Ichthyological Society of France, Paris: 209–216