Beinfeld, M., Q. Chen, F. Gao, R. A. Liddle, L. J. Miller, and J. Rehfeld. “Cholecystokinin Receptors (version 2019.4) in the IUPHAR/BPS Guide to Pharmacology Database”. IUPHAR/BPS Guide to Pharmacology CITE, Vol. 2019, no. 4, Sept. 2019, doi:10.2218/gtopdb/F15/2019.4.