1. Cancer statistics;A Jemal;CA Cancer J Clin,2007
2. Estimates of worldwide burden of cancer in 2008: GLOBOCAN 2008;J Ferlay;Int J Cancer,2010
3. World Cancer Report;P Boyle,2008
4. Human papillomavirus types in head and neck squamous cell carcinomas worldwide: A systematic review;A Kreimer;Cancer Epidemiol Biomarkers Prev,2005
5. B.J. Gosselin Malignant tumours of the mobile tongue: Medscape (2015) http://emedicine.medscape.com/article/847428-overview#showall [accessibility verified 03.07.16