2) Goldman, L., Hornby, P., Meyer, R. and Goldman, B.: Impact of the laser on dental caries. Nature 203: 417, 1964.
3) Sognnaes, R. F. and Stern, R. H.: Laser effect on resistance of human dental enamel to demineralization in vitro. J. So. Cal. Dent. Assoc. 33 : 328-329, 1965.
4) Stern, R. H., Vahl, J. and Sognnaes, R. F.: Lased enamel: Ultrastructural observations of pulsed carbon dioxide laser effect. J. Dent. Res. 51: 455-460, 1972.
5) Yamamoto, H. and Sato, K.: Prevention of dental caries by Nd : YAG laser irradiation. J. Dent. Res. 59 : 2171-2177, 1980.