%0 Journal Article
%A V. V. Volchkov
%T Two-radii theorems on spaces of constant curvature
%J Doklady Akademii Nauk
%D 1996
%P 300-302
%V 347
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1996_347_3_a2/
%G ru
%F DAN_1996_347_3_a2