1. A process controller that adapts to signal and process conditions;Andreiev,1977
2. A new dimension: A self tuning controller that continually optimizes PID constants;Andreiev,1981
3. Feedback design of systems with significant uncertainty;Ashworth,1982
4. Automatic tuning of simple regulators with specifications on phase and amplitude margins;Astrom;Automatica,1984
5. Adaptive control;Astrom,1989