TY - JOUR AU - A. D. Taimanov TI - Decidability of the elementary theory of sphere inclusion JO - Algebra i logika PY - 1963 SP - 23 EP - 27 VL - 2 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/AL_1963_2_3_a1/ LA - ru ID - AL_1963_2_3_a1 ER -