Equivalent conditions for laws of large numbers for T-related L-R fuzzy numbers. - Dug Hun Hong; Chulhwan Ahn (Fuzzy Sets Syst., 2003)

Ridge estimation for regression models with crisp inputs and Gaussian fuzzy output. - Dug Hun Hong; Changha Hwang; Chulhwan Ahn (Fuzzy Sets Syst., 2004)