%0 Journal Article
%A V. I. Berdyshev
%T A moving object and observers in $\mathbb R^2$ with piecewise smooth shading set
%J Trudy Instituta matematiki i mehaniki
%D 2015
%P 95-101
%V 21
%N 4
%U http://geodesic.mathdoc.fr/item/TIMM_2015_21_4_a8/
%G ru
%F TIMM_2015_21_4_a8