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

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