Desmond, H., Pauwels, S., Varro, A., Gregory, H., Young, J., & Dockray, GJ. (1987). Isolation and Characterization of the Intact Gastrin Precursor From a Gastrinoma. FEBS Letters, 210(2), 185-188. https://doi.org/10.1016/0014-5793(87)81334-0 (Original work published 1987)