Johansson , H., L. Grimelius, U. Heitz, G. Lundqvist, P. Peterson, G. Portela-Gomes, and E. Wilander. “The Effects of Endogenous Hypergastrinemia and Hypogastrinemia on the Exocrine and Endocrine Rat Pancreas”. Upsala Journal of Medical Sciences, vol. 84, no. 3, Sept. 1979, pp. 247-54, doi:10.3109/03009737909179161.