McKee KK, Tan CP, Palyha OC, Liu J, Feighner SD, Hreniuk DL, Smith RG, Howard AD, Van der Ploeg LH (Mar 1998). „Cloning and characterization of two human G protein-coupled receptor genes (GPR38 and GPR39) related to the growth hormone secretagogue and neurotensin receptors”. Genomics46 (3): 426–34. DOI:10.1006/geno.1997.5069. PMID9441746.
McKee KK, Tan CP, Palyha OC, Liu J, Feighner SD, Hreniuk DL, Smith RG, Howard AD, Van der Ploeg LH (Mar 1998). „Cloning and characterization of two human G protein-coupled receptor genes (GPR38 and GPR39) related to the growth hormone secretagogue and neurotensin receptors”. Genomics46 (3): 426–34. DOI:10.1006/geno.1997.5069. PMID9441746.