1. Bleaching fluorosed teeth;Clin. Res. Assoc. Newsletter,1979
2. Bleaching vital tetracycline-stained teeth;Christensen;Quint. Int.,1978
3. Veneers: State of the art;Christensen,1983
4. Visible-curing lights-extra-wide area of cure;Clin. Res. Assoc. Newsletter,1984