1. International Agency for Research on Cancer (IARC). Cancer: causes, occurrence and control. IARC Scientific Publications, No. 100, Lyon, 1990.
2. World Health Organisation (WHO), Food and Agriculture Organisation (FAO). Diet, nutrition and the prevention of chronic diseases: report of a joint WHO/FAO expert consultation. Geneva: WHO; 2002.
3. World Cancer Research Fund (WCRF), American Institute for Cancer Research (AICR). Food, nutrition and the prevention of cancer: a global perspective. Washington, DC: AICR; 1997.
4. Risk factors for oral and pharyngeal cancer in young adults;Rodriguez;Oral Oncol,2004
5. Aetiology of oral cancer: alcohol;Ogden;Br J Oral Maxillofac Surg,1998