Selking , Örjan, S. Gustavsson, H. Johansson, and G. Lundqvist. “Effect of Parathyroid Hormone on Gastrin and Somatostatin Release from the Gastric Antrum”. Upsala Journal of Medical Sciences, vol. 86, no. 3, Sept. 1981, pp. 259-67, doi:10.3109/03009738109179237.