1. Crossner C, Unell L. A longitudinal study of dental health from the age of 14 to 41. Swed Dent J 2007; 31:65–74.
2. Davies JA, Smith PA, Pitts NB. Monitoring the Dental Health of Scottish Children Using Routinely Collected Data. Health Bulletin 1996; 54:348–354.
3. Ekbäck G, Persson C. Caries in five different socio-economic clusters in Örebro county: w 2012; 29:229–32
4. Harris R, Nicoll A, Adair P, Pine C. Risk factors for dental caries in young children: a systematic review. Comm Dent Health 2004; 21:71–85.
5. Hugoson A, Koch G, Göthberg C et al. Oral health of individuals aged 3–80 years in Jönköping, Sweden during 30 years (1973–2003). Part II. Review of clinical and radiological findings. Swed Dent J 2005; 29:139–155.