Sharma J B, Pundir P, Sharma A
Department of Obstetrics and Gynecology and Neurosurgery, Maulana Azad Medical College affiliated Lok Nayak and G.B. Pant Hospital, New Delhi, India.
Int J Gynaecol Obstet. 2003 Mar;80(3):321-3. doi: 10.1016/s0020-7292(02)00342-9.