1. Porcelain-fused-to-metal: Tooth preparation and coping design;Hobo;J Prosthet Dent,1973
2. Studies on the wear of porcelain, enamel, and gold;Monasky;J Prosthet Dent,1971
3. Modern Practice in Dental Ceramics;Johnston,1967
4. Gnathological Occlusion;Thomas,1979