Jens F. Rehfeld, Jörgen Lindholm, Bent N. Andersen, Linda Bardram, Per Cantor, Mogens Fenger, Dieter K. Lüdecke,
Pituitary Tumors Containing Cholecystokinin New England Journal of Medicine. ,vol. 316, pp. 1244- 1247 ,(1987) ,
10.1056/NEJM198705143162004