1. Centers for Disease Control (2001). Morbidity and Mortality Weekly Report: Vol. 50. Recommendations for using fluoride to prevent and control dental caries in the United States (Report No. 14). Retrieved from CDC website: http://www.cdc.gov/MMWr/preview/mmwrhtml/rr5014a1.htm .
2. Crosta, P. (2009). What is fluoride? What does fluoride do? Retrieved from Medical News Today website: http://www.medicalnewstoday.com/articles/154164.php .
3. Lussi, A., Hellwig, E., & Klimek, J. (2012). Fluorides: Mode of action and recommendations for use. Schweizer Monatsschrift fur Zahnmedizin, 122(11), 1030–1036.
4. Heifetz, S., & Horowitz, H. S. (1986). Amounts of fluoride in self-administered dental products: Safety considerations for children. Pediatrics, 77(6), 876–882.
5. Erdal, S., & Buchanan, S. (2005). A quantitative look at fluorosis, fluoride exposure, and intake in children using a health risk assessment approach. Environmental Health Perspectives, 113(1), 111–117.