TY - JOUR AU - V. I. Berdyshev TI - A trajectory in $\mathbb {R}^3$ concealed from observers JO - Trudy Instituta matematiki i mehaniki PY - 2016 SP - 47 EP - 54 VL - 22 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TIMM_2016_22_2_a5/ LA - ru ID - TIMM_2016_22_2_a5 ER -