TY - JOUR AU - A. A. Ershov AU - A. V. Ushakov AU - V. N. Ushakov TI - An approach problem for a~control system and a~compact set in the phase space in the presence of phase constraints JO - Sbornik. Mathematics PY - 2019 SP - 1092 EP - 1128 VL - 210 IS - 8 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SM_2019_210_8_a1/ LA - en ID - SM_2019_210_8_a1 ER -