The Complete Set of PID Controllers with Guaranteed Gain and Phase Margins. - Keunsik Kim; Young Chol Kim (CDC/ECC, 2005)

Sensitivity of Time Response to Characteristic Ratios. - Youngchol Kim; Keunsik Kim; Shunji Manabe (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2006)