TY - JOUR AU - M. I. Bekenov AU - A. M. Nurakunov TI - A semigroup of theories and its lattice of idempotent elements JO - Algebra i logika PY - 2021 SP - 3 EP - 22 VL - 60 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/AL_2021_60_1_a0/ LA - ru ID - AL_2021_60_1_a0 ER -