TY - JOUR AU - Takáč, Zdenko TI - On some properties of $\alpha $-planes of type-2 fuzzy sets JO - Kybernetika PY - 2013 SP - 149 EP - 163 VL - 49 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/KYB_2013__49_1_a10/ LA - en ID - KYB_2013__49_1_a10 ER -