1. Hematometra;Bernstein;Am. J. Obst. & Gynec.,1939
2. Hematocolpos due to imperforate hymen;Calvin;Am. J. Dis. Child.,1936
3. Greenhill, J. P.: Surgical Gynecology, 2nd ed. Chicago: The Year Book Publishers, Inc., 1957, pp. 104-105.
4. Reproductive System;Netter,1954
5. Symptomatic genital anomalies in childhood;Rosenthal;Clin. Obst. & Gynec.,1960