1Lue TF, Hricak H, Marich KW, et al. Vasculogenic impotence evaluated by high - resolution ultrasonography and pulsed Doppler spectrum analysis[J]. Radiology, 1985, 155:777-781
2Quan JP, King BF, James EM, et al. Duplex and color Doppler sonographic evaluation of casculogic impotence[J]. AJR, 1989,153:1141-1147
3Erdogru J, Kadioglu A. Does the positive intracaveernous papaverine test always indicate a normal penile vascular system[J]. Eur Urol, 1997, 31:323-328
