1. Oral Cancer: A Historical Review
2. Oral Healthhttps://www.who.int/news-room/fact-sheets/detail/oral-health
3. GLOBOCANhttps://gco.iarc.fr/today/data/factsheets/cancers/1-Lip-oral-cavity-fact-sheet.pdf
4. Global Cancer Observatory: Cancer Tomorrow;Ferlay,2018
5. Epidemiology of Oral Cancer;García-Martín,2019