%0 Journal Article
%A A. V. Shokurov
%T On the homotopy and homology realization of exact sequences of groups
%J Sbornik. Mathematics
%D 1975
%P 77-86
%V 25
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_1975_25_1_a4/
%G en
%F SM_1975_25_1_a4