1. Verbesserung der InsPektionsmoglchkeiten von vulva, vagin and Portio;Hinselmann;Munchen Med Wchuschr,1925
2. The value of colPoscoPY in the detection of Preclinical carcinoma of the cervix;Coppleson;J Obstet Gynecol Brit Emp,1960
3. Abnormal Papanicolaou smear;Townsend;Am J Obstet Gynecol,1970
4. Application of cryosurgery to gynecologic malignancy;Crisp;Obstet Gynecol,1967
5. Practical Colposcopy;Cartier,1984