1. Verneuil, A.A., quoted by Tuttle, J.P.: A Treatise on Diseases of the Anus, Rectum and Pelvic Colon, 2nd edition. New York, Appleton, 1906
2. Kocher, T.: Die Exstirpatio recti nach vorheriger Excision des Steissbeines. Centralbl. Chir.10:145, 1874
3. Kraske, P.: Zur Exstirpation hochsitzender Mastdarmkrebse. Verh. Dtsch. Ges. Chir.14:464, 1885
4. Cripps, W.H.: Cancer of the Rectum. London, Churchill, 1880
5. Bevan, A.D.: Carcinoma of rectum—treatment by local excision. Surg. Clin. North Am.1:1233, 1917