1. New Method Machines: Sintered Carbides, Sintered Borides, Hardened Tool Steels;Cohan;J. Metals,1951
2. Hard, Brittle Materials Machined Using Ultrasonic Vibrations;Kelly;Materials and Methods,1951
3. Ultrasonic Dental Cutting Instrument. I;Nielson;J. Am. Dent. Assoc,1955
4. Ultrasonic Dental Cutting Instrument. II;Nielson;J. Am. Dent. Assoc,1955
5. Comparison of the Cutting Effect on Bone of an Ultrasonic Cutting Device and Rotary Burs;McFall;J. Oral Surg,1961