%0 Journal Article %A Urs Würgler %T On a Class of 2-Periodic Cohomology Theories. %J Mathematische Annalen %D 1984 %P 251-270 %V 267 %I mathdoc %U http://geodesic.mathdoc.fr/item/MAN_1984__267_163892/ %F MAN_1984__267_163892