1. Global cancer statistics, 2002;Parkin;CA Cancer J Clin.,2005
2. Cancer statistics, 2007;Jemal;CA Cancer J Clin.,2007
3. Ries LAG,Melbert D,Krapcho M, et al. E. SEER Cancer Statistics Review, 1975-2004, National Cancer Institute. Available from: http://seer.cancer.gov/csr/1975_2004/. Accessed on August 12, 2008.
4. Tongue and tonsil carcinoma: increasing trends in the US population ages 20-44 years;Shiboski;Cancer.,2005
5. Some epidemiological features of cancer;Levin;Cancer.,1948