A combined transvaginal B-Mode and color Doppler sonography for differential diagnosis of ovarian tumors: results of a multivariate logistic regression analysis. - Schelling,M.; Braun,M.; Kuhn,W.; Bogner,G.; Gruber,R.; Gnirs,J.; Schneider,K.T.; Ulm,K.; Rutke,S.; Staudach,A. (Gynecol Oncol, 2000)