1. Optimal settings for automatic controllers;Ziegler;Trans. ASME,1942
2. Self-tuning PID controller uses pattern recognition approach;Kraus;Control Engrg.,1984
3. An expert system for adaptive PID tuning based on pattern recognition techniques;Litt,1986
4. Real-time expert tuners for PI controllers;Porter,1987
5. Microcomputer based expert control and adaptive PID control;Lebow,1988