%0 Journal Article %A Clapp, Mónica %A Ding, Yanheng %A Hernández-Linares, Sergio %T Strongly indefinite functionals with perturbed symmetries and multiple solutions of nonsymmetric elliptic systems %J Electronic Journal of Differential Equations %D 2004 %V 2004 %I mathdoc %U http://geodesic.mathdoc.fr/item/EJDE_2004__2004__a193/ %G en %F EJDE_2004__2004__a193