1. Torsional properties of endodontic instruments, paper M43. Los Angeles;Sargent;IADR Dental Materials Section,1964
2. Torsional failure of endodontic files;Chernick;J Endod,1976
3. New American Dental Association Specification No. 28 for endodontic files and reamers Council on Dental Materials and Devices;JADA,1976
4. The biomechanics of endodontic therapy;Heuer;Dent Clin North Am,1963
5. Physical properties of stainless steel endodontic files and reamers;Craig;Oral Surg,1963