TY - JOUR AU - Hong, Dug Hun TI - On types of fuzzy numbers under addition JO - Kybernetika PY - 2004 SP - [469] VL - 40 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/KYB_2004__40_4_a4/ LA - en ID - KYB_2004__40_4_a4 ER -