Yamaguchi, Y. & Kaiya, H. & Konno, N. & Iwata, E. & Miyazato, M. & Uchiyama, M. & Bell, J.D. & Toop, T. & Donald, J.A. & Brenner, S. & Venkatesh, B. & Hyodo, S. (2012)
The fifth neurohypophysial hormone receptor is structurally related to the V2-type receptor but functionally similar to V1-type receptors. General and Comparative Endocrinology, 178(3), 519–528
DOI: 10.1016/j.ygcen.2012.07.008

Kaiya, H. & Kodama, S. & Ishiguro, K. & Matsuda, K. & Uchiyama, M. & Miyazato, M. & Kangawa, K. (2009)
Ghrelin-like peptide with fatty acid modification and O -glycosylation in the red stingray, Dasyatis akajei. BMC Biochemistry, 10, Article 30
DOI: 10.1186/1471-2091-10-30

Kawakoshi, A. & Kaiya, H. & Riley, L.G. & Hirano, T. & Grau, E.G. & Miyazato, M. & Hosoda, H. & Kangawa, K. (2007)
Identification of a ghrelin-like peptide in two species of shark, Sphyrna lewini and Carcharhinus melanopterus. General and Comparative Endocrinology, 151(3), 259–268
DOI: 10.1016/j.ygcen.2006.10.012