%0 Journal Article
%A N. A. Gusevskii
%A N. S. Zindinova
%T A characterization of extended Schottky groups
%J Doklady Akademii Nauk
%D 1986
%P 1054-1057
%V 286
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1986_286_5_a6/
%G ru
%F DAN_1986_286_5_a6