TY - JOUR AU - O. S. Tarasova TI - Classes of $k$-valued logic that are closed with respect to the extended superposition operation JO - Vestnik Moskovskogo universiteta. Matematika, mehanika PY - 2001 SP - 54 EP - 57 IS - 6 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/VMUMM_2001_6_a11/ LA - ru ID - VMUMM_2001_6_a11 ER -