TY  - JOUR
AU  - V. I. Berdyshev
TI  - A moving object and observers in $\mathbb R^2$ with piecewise smooth shading set
JO  - Trudy Instituta matematiki i mehaniki
PY  - 2015
SP  - 95
EP  - 101
VL  - 21
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/TIMM_2015_21_4_a8/
LA  - ru
ID  - TIMM_2015_21_4_a8
ER  -