TY - JOUR AU - Nguyen Van Hoa TI - On closed classes of $k$-valued logic that are self-dual with respect to transitive groups JO - Diskretnaya Matematika PY - 1996 SP - 129 EP - 156 VL - 8 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DM_1996_8_1_a7/ LA - ru ID - DM_1996_8_1_a7 ER -