1. Chia TL, Lefkowitz I. Robust PID Tuning Using IMC Technology–Pt. 1 & Pt. 2. INTECH Magazine. October 1992.
2. Brosilow CB. Modular multivariable control apparatus and method. United States Patent, Patent Number: 5,191,521.
3. Robust process control;Morari,1989
4. Feedback control systems, Sec. 1.8;Van de Vegte,1986
5. Techniques of model-based control;Brosilow,2002