%0 Journal Article
%A John Harper
%A Claude Schochet
%T Coalgebra Extensions in Two-Stage Postnikov Systems.
%J Mathematica Scandinavica
%D 1971
%P 232-236
%V 29
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MS2_1971__29_166207/
%F MS2_1971__29_166207