1. WHO|Oral health, http://www.who.int/oral_health/publications/factsheet/en/
2. WHO|Oral health databases, http://www.who.int/oral_health/databases/en/
3. WHO|Strategies for oral disease prevention and health promotion, http://www.who.int/oral_health/strategies/en/
4. Oral Health Country/Area Profile Project, https://www.mah.se/capp/
5. WHO|11th IADR World Congress on Preventive Dentistry, http://www.who.int/oral_health/events/congress-preventive-dentistry-oct2017-outcomes/en/