%0 Journal Article
%A R. G. Alizade
%T Characteristic classes (purities) of short exact sequences in the category of Abelian groups
%J Matematičeskie zametki
%D 1986
%P 3-15
%V 40
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZM_1986_40_1_a0/
%G ru
%F MZM_1986_40_1_a0