Fuzzy Sets and Systems
Fuzzy Sets and Systems > 1998 > 93 > 2 > 223-230
Fuzzy Sets and Systems > 1998 > 94 > 3 > 287-308
Fuzzy Sets and Systems > 1998 > 95 > 3 > 273-293
Fuzzy Sets and Systems > 1998 > 95 > 3 > 349-367
Fuzzy Sets and Systems > 1998 > 96 > 3 > 335-341
Fuzzy Sets and Systems > 1998 > 98 > 3 > 343-354
Fuzzy Sets and Systems > 1998 > 100 > 1-3 > 29-43