1. Cancer Survival 1991–1998,2000
2. Cancer Statistics – England and Wales,1994
3. Mortality Statistics: England and Wales,1984
4. Colorectal cancer in patients over 70 years old;Kashtan;Isr J Med Sci,1992
5. Decreased operative mortality from colorectal cancer but unchanged treatment results during 30–50 years;Ohman;Larkartidningren,1982