Tankurt, E., Yeğen, B.C., Biren, T., Gürmen, N., Onat, F., Erçil, A., Oktay, S., Ulusoy, N.B., “Influence of Pirenzepine on Gallbladder Contraction in Man Induced by Sham Feeding or an Intraduodenal Meal”, Digestion, 51, 2, 103-109, 1992.