Schellenberg, R., Zimmermann, C. and Drewe, J. 2016. Dose-dependent efficacy of the Vitex agnus castus extract Ze 440 in patients suffering from premenstrual syndrome. REPRODUCTIVE ENDOCRINOLOGY. 30 (Sep. 2016), 111–118. DOI:https://doi.org/10.18370/2309-4117.2016.30.111-118.