%0 Journal Article %A A. Weinstein %A R. Lashof %A M.J. Gotay %T Closed forms on symplectic fibre bundles. %J Commentarii mathematici Helvetici %D 1983 %P 617-621 %V 58 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMH_1983__58_139957/ %F CMH_1983__58_139957