Moriyama, S. & Oda, M. & Yamazaki, T. & Yamaguchi, K. & Amiya, N. & Takahashi, A. & Amano, M. & Goto, T. & Nozaki, M. & Meguro, H. & Kawauchi, H. (2008)
Gene structure and functional characterization of growth hormone in dogfish, Squalus acanthias. Zoological Science, 25(6), 604–613
DOI: 10.2108/zsj.25.604

Takahashi, A. & Amemiya, Y. & Nozaki, M. & Sower, S.A. & Kawauchi, H. (2001)
Evolutionary significance of proopiomelanocortin in agnatha and chondrichthyes. Comparative Biochemistry and Physiology – Part B, Biochemistry and Molecular Biology, 129(2–3), 283–289
DOI: 10.1016/S1096-4959(01)00330-X