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Computers and Mathematics with Applications > 2000 > 39 > 12 > 1-9
Fuzzy Sets and Systems > 1999 > 101 > 3 > 477-484
Computers and Mathematics with Applications > 2000 > 39 > 12 > 1-9
Fuzzy Sets and Systems > 1999 > 101 > 3 > 477-484