TY - JOUR AU - V. N. Kniahina TI - On the product of a $B$-group and a primary group JO - Problemy fiziki, matematiki i tehniki PY - 2017 SP - 52 EP - 57 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/PFMT_2017_3_a8/ LA - ru ID - PFMT_2017_3_a8 ER -