1. Handbook of PI-PID controller tuning rules;O'Dwyer,2006
2. PID Controllers:Theroy, Design and Tuning;Astrom,1995
3. The future of PID control;Astrom;Control Engineering Practice,2001
4. Real Time Implementaiong of a new CDM-PI control scheme in a conical Tank Liquid Level Maintaining System, CCSE;Bhaba;Modern Applied Science,2009
5. Cahyadi.A.I., Isarakorn.D., Benjanarasuth.T., Ngamwiwit.J., Komine.N., (2004), Application of coefficient diagram method for rotational inverted pendulum control, Control, Automation, Robotics and Vision, the 8th international conference, ICARCV, 3.