%0 Journal Article %A Marton Harris %T Cup products, duality and periodicity for generalized group cohomology %J Fundamenta Mathematicae %D 1970 %P 99-121 %V 66 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-66-1-99-121/ %R 10.4064/fm-66-1-99-121 %G en %F 10_4064_fm_66_1_99_121