1. Williams, N.S.: The rationale for preservation of the anal sphincter in patients with low rectal cancer. Br. J. Surg.71:575, 1984
2. Black, W.A., Waugh, J.M.: The intramural extension of carcinoma of the descending colon, sigmoid and rectosigmoid: A pathologic study. Surg. Gynecol. Obstet.87:457, 1948
3. Quer, E.A., Dahlin, D.C., Mayo, C.W.: Retrograde intramural spread of carcinoma of the rectum and rectosigmoid. Surg. Gynecol. Obstet.96:24, 1953
4. Grinnell, R.S.: Distal intraumural spread of carcinoma of the rectum and rectosigmoid. Surg. Gynecol. Obstet.99:421, 1954
5. Rinnert-Gongora, S., Tartter, P.I.: Multivariate analysis of recurrence after anterior resection for colorectal carcinoma. Am. J. Surg.157:573, 1989