%0 Journal Article
%A John R. Harper
%T Stable Secondary Cohomology Operations.
%J Commentarii mathematici Helvetici
%D 1969
%P 341-353
%V 44
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMH_1969__44_139404/
%F CMH_1969__44_139404