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Applied Mathematical Modelling > 2014 > 38 > 19-20 > 4559-4573
Fuzzy Sets and Systems > 2012 > 209 > Complete > 66-83
Information Sciences > 2008 > 178 > 5 > 1309-1324
Information Sciences > 2008 > 178 > 3 > 827-835
Fuzzy Sets and Systems > 1997 > 91 > 2 > 231-237