%0 Journal Article
%A Stefan Jackowski
%T The Euler class and periodicity of group cohomology.
%J Commentarii mathematici Helvetici
%D 1978
%P 643-650
%V 53
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMH_1978__53_139762/
%F CMH_1978__53_139762