1. Kleinberg, J. in Oral Microbiology 3rd ed. (ed. Nolte, W. A.) 515–534 (Mosby, St Louis, 1977).
2. Frank, R. M. in Caries Resistant Teeth (eds Wolstenholme, G. E. & O'Connor, M.) 169–184 (Churchill, London, 1965).
3. Gilinskaya, L. G., Shcherbakova, M. Ya. & Zanin, Yu. N. Kristallografiya 15, 1016–1019 (1971).
4. Cevc, P., Schara, M., Ravnik, Č. & Skalerič, U. J. dent. Res. 55, 691–695 (1976); Radiat. Res. 51, 581–589 (1972).
5. Elliot, J. C. Calcium Tissue Res. 3, 293–307 (1969).