Inui A, Asakawa A, Bowers CY, et al. "Ghrelin, appetite, and gastric motility: the emerging role of the stomach as an endocrine organ." FASEB J 2004;18:439-456. PMID15003990
Kojima M, Hosoda H, Date Y, et al. "Ghrelin is a growth-hormone-releasing acylated peptide from stomach." Nature 1999;402:656-660. PMID10604470