Fuzzy Sets and Systems
Fuzzy Sets and Systems > 1999 > 102 > 2 > 227-236
Fuzzy Sets and Systems > 1999 > 106 > 3 > 335-347
Fuzzy Sets and Systems > 1999 > 108 > 2 > 123-143
Fuzzy Sets and Systems > 1999 > 102 > 2 > 227-236
Fuzzy Sets and Systems > 1999 > 106 > 3 > 335-347
Fuzzy Sets and Systems > 1999 > 108 > 2 > 123-143