1. A process controller that adapts to signal and process conditions;Andreiev;Control Engng.,1977
2. A new dimension: a self-tuning controller that continually optimizes PID constants;Andreiev;Control Engng.,1981
3. Bibliography on adaptive control systems;Asher,1976
4. Computer control of a paper machine—an application of linear stochastic control theory;Åström;IBM J. Res. & Dev.,1967