%0 Journal Article %A Joel M. Cohen %T Coherent Graded Rings and the Non-Existence of Spaces of Finite Stable Homotopy Type. %J Commentarii mathematici Helvetici %D 1969 %P 217-228 %V 44 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMH_1969__44_139393/ %F CMH_1969__44_139393