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Dockray et Gregory, « Does the C-terminal tetrapeptide of gastrin and CCK exist as an entity? », Nature, vol. 286, no 5774, , p. 742 (PMID7412863, DOI10.1038/286742b0)
Gregory, Tracy et Grossman, « Isolation of two gastrins from human antral mucosa », Nature, vol. 209, no 5023, , p. 583 (PMID5921182, DOI10.1038/209583a0, S2CID4169996)
Tracy et Gregory, « Physiological Properties of a Series of Synthetic Peptides Structurally Related to Gastrin I », Nature, vol. 204, no 4962, , p. 935–938 (PMID14248713, DOI10.1038/204935a0, S2CID37773104)
Gregory, Tracy et Grossman, « Isolation of two gastrins from human antral mucosa », Nature, vol. 209, no 5023, , p. 583 (PMID5921182, DOI10.1038/209583a0, S2CID4169996)
Tracy et Gregory, « Physiological Properties of a Series of Synthetic Peptides Structurally Related to Gastrin I », Nature, vol. 204, no 4962, , p. 935–938 (PMID14248713, DOI10.1038/204935a0, S2CID37773104)