Open Science Research Excellence
V. K. Singh and  P. K. Padhy,  The System Identification and PID Lead-lag Control for Two Poles Unstable SOPDT Process by Improved Relay Method.   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology. July 2011, vol. 55(7). 770 - 774[viewed 24 July 2019]. Available from: http://waset.org/publications/15669.