1. Huxley TH (1825-1895). Available at: www.quotationspage.com.
2. Evidence-based decision making in action: Part 1-Finding the best clinical evidence;Forrest;J Contemp Dent Pract,2002
3. History of Dentistry and Dental Care. Available at: www.inventors.about.com/library/inventors/bldental.htm.
4. The first mechanical toothbrush?;Scutt;Br Dent J,1975
5. Mechanical oral hygiene practices. State-of-the-science review;Frandsen,1986