1. Esthetic matching;Swepston;J Prosthet Dent,1985
2. Effects of opaque and porcelain surface texture on the color of ceramometal restorations;Obregon;J Prosthet Dent,1981
3. Cast glass ceramics;Grossman;Dent Clin North Am,1985
4. Double layer effect and other optical phenomena related to esthetics;O’Brien;Dent Clin North Am,1985
5. Periodontal aspects of porcelain restorations;Wunderlich;Dent Clin North Am,1985