article 1980 CONSERVATIVE SURGERY FOR PELVIC INFLAMMATORY DISEASE AND ENDOMETRIOSIS Clinical Obstetrics and Gynecology ·doi:10.1097/00003081-198003000-00015
other 1967 Ultrasound as a diagnostic aid in diseases of the pelvis American journal of obstetrics and gynecology ·doi:10.1016/0002-9378(67)90099-3