Charles P. Ophardt (2003). "Sugar and Tooth Decay". Elmhurst College Department of Dentistry. Archived from the original on 22 May 2016. Retrieved 23 April 2016.
Charles P. Ophardt (2003). "Sugar and Tooth Decay". Elmhurst College Department of Dentistry. Archived from the original on 22 May 2016. Retrieved 23 April 2016.