1. Oxford English Dictionary Online. Dentifrice. Available at: http://dictionary.oed.com/cgi/entry/50060952?single=1query_type=wordqueryword=dentifricefirst=1max_to_show=10. Accesssed 8/15/2007.
2. The significance of toothpaste in oral hygiene;Bowen,1992
3. Clinical and biological aspects of dentifrices;Embery,1992
4. Euromonitor International. Market sizes-historic-toothpaste-US$ mn-current prices. Available at: http://www.imis.euromonitor.com/print/aspx. Accesssed 8/15/2007.
5. Fluoride dentifrices;Heifetz,1986