1. J. P. Carlos, B. Cohen, B. Krasse, T. M. Marthaler, A. I. Rybakov, R. G. Schamschula, and M. Takeuchi (1972 ) The etiology and prevention of dental caries . World Health Organisation Technical Report SeriesNo. 494.
2. Y. Ericsson (1973 ) Nordisk larobok i Kariologi . 3rd ed. , p. 448 . Stockholm: AB Egnellska Boktryckeriet.
3. Experimental Caries in Man