1. 1. Grindefjord M, Dahllöf G, Nilsson B, Modéer T. Stepwise prediction of dental caries in children up to 3.5 years of age. Caries Res 1996; 30: 256-66.
2. 2. Stecksén-Blicks C, Sunnegårdh K, Borssén E. Caries experience and background factors in 4-year-old children: time trends 1967-2002. Caries Res 2004; 38:149-55.
3. 3. Wendt LK, Hallonsten AL, Koch G. Oral health in pre-school children living in Sweden. Part III - A longitudinal study. Risk analyses based on caries prevalence at 3 years of age and immigrant status. Swed Dent J 1999; 23: 17-25.
4. 4. Wang NJ. Dental caries and resources spent for dental care among immigrant children and adolescents in Norway. Int Dent J 1996; 46: 86-90.
5. 5. Skeie MS, Espelid I, Skaare AB, Gimmestad A. Caries patterns in an urban preschool population in Norway. Eur J Paediatr Dent 2005; 1: 16-22.