Asharif, F., S. Tamaki, T. Nagado, T. Nagata, and M. R. Asharif. “Design of Loop-Shaping and Internal Model Controller for Unstable and Communication Delay System ”. International Journal of Control and Automation, Vol. 4, no. 2, Dec. 2011, pp. 23 -4, http://sersc.org/journals/index.php/IJCA/article/view/154.