%0 Journal Article %A Ib Madsen %A Leif Kristensen %T On Evaluation of Higher Order Cohomology Operations. %J Mathematica Scandinavica %D 1967 %P 114-130 %V 20 %I mathdoc %U http://geodesic.mathdoc.fr/item/MS2_1967__20_165986/ %F MS2_1967__20_165986