%0 Journal Article
%A R. I. Grigorchuk
%A P. F. Kurchanov
%T Classification of epimorphisms of fundamental groups of surfaces onto free groups
%J Matematičeskie zametki
%D 1990
%P 26-35
%V 48
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZM_1990_48_2_a3/
%G ru
%F MZM_1990_48_2_a3