%0 Journal Article %A Takashi Matsuoka %T The Number and Linking of Periodic Solutions of Periodic Systems. %J Inventiones mathematicae %D 1982 %P 319-340 %V 70 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM_1982__70_142978/ %F IM_1982__70_142978