1) YOU BJ. Caries prevention in Chinese children with sodium fluoride dentifrice delivered through a kindergarten-based oral health program in China. J Clin Dent. (2002) vol.13, p.179-184.
2) HOLTTA P. Effect of supervised use of a fluoride toothpaste on caries incidence pre-school children. Int J Pediat Dent. (1992) vol.2, p.145-149.