1. Stecksén-Blicks, C. Salivary counts of lactobacilli and Streptococcus mutans in caries prediction. Scand. J. Dent. Res. 93, 204–212 (1985).
2. Krasse, B. Biological factors as indicators of future caries. Int. Dent. J. 38, 219–225 (1988).
3. McCormack-Brown, K.R. & McDermott, R.J. Dental caries: selected factors of children at risk. Dent. Assist. 60, 10–14 (1991).
4. Mundorff, S.A., Eisenberg, A.D., Leverett, D.H., Espeland, M.A. & Proskin, H.M. Correlations between numbers of microflora in plaque and saliva. Caries Res. 24, 312–317 (1990).
5. van Houte, J. Microbiological predictors of caries risk. Adv. Dent. Res. 7, 87–96 (1993).