1) Klock, B. and Krasse, B.: Microbial and salivary conditions in 9. to 12-year-old children, Scand. J. Dent. Res., 85; 56-63, 1977.
2) Kristoffersson, K., Axelsson, P., Birkhed, D. and Bratthall, D.: Caries prevalence, salivary Streptococcus mutans and dietary scores in 13-year-old Swedish schoolchildren, Community Dent. Oral. Epidemiol., 14; 202-205, 1986.
3) Alaluusua, S., Myllarneiemi, S. and Kallio, M.: Streptococcus mutans infection level and caries in a group of 5-year-old children, Caries Res., 23; 190-194, 1989.
4) Zickert, I., Emilson, C.G. and Krasse, B.: Streptococcus mutans, lactobacilli and dental health in 13-14-year-old Swedish children, Community Dent. Oral Epidemiol., 10; 77-81, 1982.
5) Zickert, I., Emilson, C.G. and Krasse, B.: Correlation of level and duration of Streptococcus mutans infection with incidence of dental caries, Infect. Immun., 39; 982-985, 1983.