Estrogenic activity of the phytoestrogens naringenin, 6-(1,1-dimethylallyl)naringenin and 8-prenylnaringenin - Zierau,O.; Gester,S.; Schwab,P.; Metz,P.; Kolba,S.; Wulf,M.; Vollmer,G. (Planta Medica, 2002)