1. Y. Yang and F. Gao, Control Eng. Pract., 8, 1285–1296, 2000
2. F. Gao, W.I. Patterson, and M.R. Kamal, Polym. Eng. Sci., 36, 1272–1285, 1996
3. K.J. Aström and T. Hägglund, PID Control-Theory, Design, and Tuning, Instrument Society of America, North Carolina, 1995
4. Y. Yang and F. Gao, Int. Polym. Process., XIV, 196–205, 1999
5. K.J. Aström and B. Wittenmark, Adaptive Control (2nd ed.), Addison-Wesley, Boston, MA, 1995