1. Boyle P, Levin B (2008). World Cancer Report. IARC: Lyon, France.
2. Ferlay J, Bray F, Pisani P, Parkin M (2004). Cancer insidence, Mortality and Prevalence Wold wide. Globocan 2002. IARC CancerBase No. 5. IARC Lyon.
3. Finish Cancer Registry. http://www.cancer.fi/syoparekisteri/en/statistics/cancer-statistics/ Accessed 2013 March 19.
4. Howlader N, Noone AM, Krapcho M, Neyman N, Aminou R, et al.. (2011). SEER Cancer Statistics Review, 1975–2008, National Cancer Institute. Bethesda, MD.
5. Stephen BE BD, Compton CC, Fritz AG, Greene FL, Trotti A (ed) (2010) AJCC. Part III Digestive System: Colon and Rectum. In Cancer Staging Handbook, Seventh edition edn, Chapter Part III Di gestive System, pp 173–206. New York: Springer.