By Do S.K.   Ye B.Y.   Won J.L.   in European Journal of Operational Research

ISSN:0377-2217|107|3|686-691

Elsevier‎(1998)‎

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By Gue M.L.   Do S.K.   Byung S.L.   in Fuzzy Sets and Systems

ISSN:0165-0114|78|3|381-386

Elsevier‎(1996)‎

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By Byung S.L.   Gue M.L.   Sung J.C.   Do S.K.   in Fuzzy Sets and Systems

ISSN:0165-0114|98|1|133-136

Elsevier‎(1998)‎

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