TY - JOUR AU - S. A. Shakhova TI - Absolutely Closed Groups in the Class of $2$-Step Nilpotent Torsion-Free Groups JO - Matematičeskie zametki PY - 2015 SP - 936 EP - 941 VL - 97 IS - 6 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZM_2015_97_6_a11/ LA - ru ID - MZM_2015_97_6_a11 ER -