1. World Health Organization. Strengthening the prevention of oral cancer: the WHO perspective
http://www.who.int/oral_health/publications/CDOE05_vol33_397_9/en/
(accessed on 26 Oct 2013).
2. Dikshit, R. et al. Cancer mortality in India: a nationally representative survey. Lancet 379, 1807–1816 (2012).
3. International Agency for Research on Cancer. GLOBOCAN 2008.
http://globocan.iarc.fr/factsheets/populations/factsheet.asp?uno=900
(accessed on 26 Oct 2013).
4. World Health Organization. Tobacco free initiative
http://www.who.int/tobacco/research/cancer/en/
(accessed on 26 Oct 2013).
5. IARC Working Group on the Evaluation of Carcinogenic Risks to Humans. Betel-quid and areca-nut chewing and some areca-nut-derived nitrosamines. IARC monographs on the evaluation of carcinogenic risks to humans v. 85, Lyon, France (2003)
(http://monographs.iarc.fr/ENG/Monographs/vol85/mono85.pdf)
accessed 2013.