%0 Journal Article
%A George Danas
%T The Obstruction theory of Group Extensions and H^3(Q, A) in Abstract Categories
%J Μαθηματική Επιθεώρηση
%D 1994
%P 45-55
%V 41
%U http://geodesic.mathdoc.fr/item/MR_1994_41_a2/
%G gr
%F MR_1994_41_a2