TY - JOUR AU - V. I. Berdyshev TI - Observation of an object opposed to the observer in the space $\mathbb{R}^2$ JO - Trudy Instituta matematiki i mehaniki PY - 2024 SP - 45 EP - 52 VL - 30 IS - 3 UR - http://geodesic.mathdoc.fr/item/TIMM_2024_30_3_a3/ LA - ru ID - TIMM_2024_30_3_a3 ER -