1. Anderson MC, Hartley RB (1980) Cervical crypt involvement by intraepithelial neoplasia. Obstet Gynecol 55:546?550
2. Baker JR (1960) Principles of biological microtechnique. A study of fixation and dyeing. Methuen, London
3. Berg W (1908) Quoted by Baker JR (1960) Principles of biological microtechnique. A study of fixation and dyeing. Methuen, London, pp 76, 98
4. Burghardt E (1972) Histologische Frühdiagnose des Zervixkrebses. Thieme, Stuttgart
5. Charles EH, Savage EW (1980) Cryosurgical treatment of cervical intra-epithelial neoplasia. Obstet Gynecol Surv 35:539?548