%0 Journal Article
%A V. I. Berdyshev
%T Object visibility for a~group of observers with inaccurately given coordinates
%J Trudy Instituta matematiki i mehaniki
%D 2009
%P 44-51
%V 15
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TIMM_2009_15_4_a4/
%G ru
%F TIMM_2009_15_4_a4