1. Cancer facts and figures;Boring;CA Cancer J. Clin.,1992
2. Urban–rural difference in the trend of colorectal cancer mortality with special reference to the subsites of colon cancer in Japan;Tajima;Jpn. J. Cancer Res.,1985
3. B.S. Reddy, Diet and colon cancer: evidence from human and animal model studies, in: B.S. Reddy, L.A. Cohen (Eds.), Nutrition and Cancer, CRC Press, Boca Raton, FL, 1986, pp. 47–65.
4. Environmental factors in cancer of colon and rectum;Wynder;Cancer,1969
5. L.W. Wattenberg, Chemoprevention of cancer by naturally occurring and synthetic compounds, in: L.W. Wattenberg, M. Lipkin, C.W. Boone, G.J. Kelloff (Eds.), Cancer Chemoprevention, CRC Press, Boca Raton, FL, 1992, pp. 19–39.