%0 Journal Article
%A S. M. Zerkal'
%T Determination of non-transparent regions in the Earth by method of computer

%J Doklady Akademii Nauk
%D 1991
%P 330-333
%V 317
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1991_317_2_a18/
%G ru
%F DAN_1991_317_2_a18