Fuzzy Sets and Systems
Fuzzy Sets and Systems > 1996 > 79 > 1 > 59-68
Fuzzy Sets and Systems > 1996 > 80 > 3 > 273-293
Fuzzy Sets and Systems > 1998 > 100 > 1-3 > 235-243
Fuzzy Sets and Systems > 1996 > 79 > 1 > 59-68
Fuzzy Sets and Systems > 1996 > 80 > 3 > 273-293
Fuzzy Sets and Systems > 1998 > 100 > 1-3 > 235-243