1. Clarck, J., in: Reconstructive Plastic-Surgery, Ed. J. M. Converse, 2nd ed., vol. V. Saunders, New York-Toronto 1977.
2. Deucher, F., Nöthinger F.: Der transanale Eingriff beim Rektumkarzinom. Chirurg 49, 260 (1978).
3. Dixon, C. F.: Anterior resection for malignant lesions of the upper part of the rectum and lower part of the sigmoid. Trans. Amer. Surg. 66, 175 (1948).
4. Dukes, C. E.: Histological grading of rectal cancer. Proc. roy. Soc. Med. 30, 371 (1936).
5. Goligher, J. C.: Surgery of the Anus Rectum and Colon. 3rd ed. Bailliere Tindall, London 1975.