Controllability for the Nonlinear Fuzzy Control System with Nonlocal Initial Condition in EnN. - Bu Young Lee; Dong Gun Park; Gyu-Tak Choi; Young Chel Kwun (Int. J. Fuzzy Log. Intell. Syst., 2006)

Correlation coefficient of interval-valued intuitionistic fuzzy sets and its application to multiple attribute group decision making problems. - Dong Gun Park; Young Chel Kwun; Jin Han Park; Il Young Park (Math. Comput. Model., 2009)