1. J. G. Ziegler and N. B. Nichols, T ASME 64, 759–768 (1942).
2. M. Yukitomo, Y. Iino, S. Hino, K. Takahashi and K. Nagata, “A new PID controller tuning system and its application to a flue gas temperature control in a gas turbine power plant,” in IEEE International Conference on Control Applications-1998, IEEE Xplore Digital Library (IEEE, 2002), pp. 1373–1377.
3. U.-C. Moon and K. Y. Lee, “Temperature control of glass melting furnace with fuzzy logic and conventional PI control,” in American Control Conference-2000, IEEE Xplore Digital Library (IEEE, 2002), pp. 2720–2724.
4. B. Feng, G. Gong, and H. Yang, “Self-tuning-parameter fuzzy PID temperature control in a large hydraulic system,” in IEEE/ASME International Conference on Advanced Intelligent Mechatronics-2009, IEEE Xplore Digital Library (IEEE, 2009), pp. 1418–1422.
5. Gravitational Search Algorithm Optimization for PID Controller Tuning in Waste-water Treatment Process