Schellenberg, Ruediger, Christian Zimmermann, and Jurgen Drewe. “Dose-Dependent Efficacy of the Vitex Agnus Castus Extract Ze 440 in Patients Suffering from Premenstrual Syndrome”. REPRODUCTIVE ENDOCRINOLOGY, no. 30 (September 30, 2016): 111–118. Accessed March 2, 2024. http://reproduct-endo.com/article/view/78809.