Fuzzy Sets and Systems
Fuzzy Sets and Systems > 1999 > 102 > 3 > 463-469
Fuzzy Sets and Systems > 2000 > 112 > 1 > 155-164
Fuzzy Sets and Systems > 2000 > 112 > 2 > 223-231
Fuzzy Sets and Systems > 2008 > 159 > 6 > 646-660
Fuzzy Sets and Systems > 1999 > 102 > 3 > 463-469
Fuzzy Sets and Systems > 2000 > 112 > 1 > 155-164
Fuzzy Sets and Systems > 2000 > 112 > 2 > 223-231
Fuzzy Sets and Systems > 2008 > 159 > 6 > 646-660