@article{EJDE_2004__2004__a93,
     author = {Clapp,  M\'onica and Ding,  Yanheng and Hern\'andez-Linares,  Sergio},
     title = {Strongly indefinite functionals with perturbed symmetries and multiple solutions of nonsymmetric elliptic systems},
     journal = {Electronic journal of differential equations},
     year = {2004},
     volume = {2004},
     zbl = {1109.35324},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2004__2004__a93/}
}