1. Specification No. 27 for “Direct Filling Resins”;American Dental Association;J. Am. Dent. Assoc.,1977
2. Acceptance Program for Composite Resin Materials for Occlusal Class I and II restorations;American Dental Association;J. Am. Dent Assoc.,1981
3. Guidelines for Submission of Composite Resin Materials for Posterior Restorations;American Dental Association Council on Dental Materials, Instruments and Equipment,1989
4. Method for determination of in vivo wear;Bangerter;J. Dent. Res.,1987
5. Replication technique for studying microstructure in fossil enamel;Beynon;Scanning Microsc.,1987