1. , and : Epidemiology of gastrointestinal cancer. In Proceedings of the Seventh National Cancer Conference. Philadelphia, J. B. Lippincott, 1973; pp. 459–464.
2. Polyps and carcinoma of the large bowel in the South African Bantu
3. Epidemiology of cancer of the colon and rectum
4. Production of Tumours in Mice by Deoxycholic Acid
5. , , and : In vitro degradation of acid and neutral steroids by anaerobic fecal microflora isolated from groups of populations on different diets. In Proceedings of the American Society of Microbiologists, 1973; p. 183.