%0 Journal Article %A Anders Kock %A Leif Kristensen %T A Secondary Product Structure in Cohomology Theory. %J Mathematica Scandinavica %D 1965 %P 113-149 %V 17 %I mathdoc %U http://geodesic.mathdoc.fr/item/MS2_1965__17_165929/ %F MS2_1965__17_165929