%0 Journal Article
%A Yu. V. Kuz'min
%T The groups of knotted compact surfaces, and central extensions
%J Sbornik. Mathematics
%D 1996
%P 237-257
%V 187
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_1996_187_2_a4/
%G en
%F SM_1996_187_2_a4