A note on the core of fuzzy numbers. - Dug Hun Hong; Eunho L. Moon; Jae Duck Kim (Appl. Math. Lett., 2010)

Steffensen's Integral Inequality for the Sugeno Integral. - Dug Hun Hong; Eunho L. Moon; Jae Duck Kim (Int. J. Uncertain. Fuzziness Knowl. Based Syst., 2014)

Generalized uniform fuzzy partition: The solution to Holčapek's open problem. - Jae Duck Kim; Eunho L. Moon; Eunjin Jeong; Dug Hun Hong (Fuzzy Sets Syst., 2016)

Ranking methods for fuzzy numbers: The solution to Brunelli and Mezei's conjecture. - Jae Duck Kim; Eunho L. Moon; Eunjin Jeong; Dug Hun Hong (Fuzzy Sets Syst., 2017)