1. “In-Process Tool Wear Sensors for Cutting Operations,”;Micheletti;CIRP Annals,1976
2. “Tool Wear Sensors,”;Cook;Wear,1980
3. “Sensors for Adaptive Control and Machine Diagnostics,”;Birla;Proc. of the Machine Tool Task Force Conf.,1980
4. “Automatic Detection of Tool Breakage Using Kalman Filter,”;Mouri;Bull. of Japanese Soc. of Precision Eng ineering,1981
5. “A Critical Review of Sensors for Unmanned Machining,”;Tlusty;CIRP Annals,1983