1. Evaluation of master cast techniques for multiple abutment implant prostheses;Vigolo;Int J Oral Maxillofac Implants,1993
2. Accuracy of four removable die techniques;Dilts;J Prosthet Dent,1971
3. Relative accuracy of four removable die systems;Myers;J Prosthet Dent,1982
4. 5. American National Standards Institute/American Dental Association: Specification No. 25 for Dental Gypsum products, 2000