TY - JOUR AU - V. I. Berdyshev TI - The motion in $\mathbb{R}^3$ of an observer under threat from an object JO - Trudy Instituta matematiki i mehaniki PY - 2023 SP - 23 EP - 26 VL - 29 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TIMM_2023_29_2_a2/ LA - ru ID - TIMM_2023_29_2_a2 ER -