Hermans, MP., Schmeer, W., & Henquin, J.-C. (1987). Modulation of the Effect of Acetylcholine On Insulin Release By the Membrane-potential of B-cells. Endocrinology, 120(5), 1765-1773. https://doi.org/10.1210/endo-120-5-1765 (Original work published 1987)