1. Bacon, H. E.: Cancer of the Colon, Rectum and Anal Canal. Philadelphia, J. B. Lippincott Company, 1964, pp. 125–159.
2. Binkley, G. E., D. A. Sunderland and C. J. Miller. Treatment of papillary adenomas of the rectum. New York J. Med.49: 1791, 1949.
3. Colcock, B. P.: Polyps of gastrointestinal tract. Geriatrics.18: 519, 1963.
4. Cooling, C., and D. Marrack: Potassium-secreting tumour of the colon. Proc. Roy. Soc. Med.50: 272, 1957.
5. Culp, C. E.: New studies of the colonic polyp and cancer: Surg. Clin.-N. Amer.47: 955 (Aug.) 1967.