@article{EJDE_2008__2008__a95,
     author = {Yang, Jianfu and Ye, Ying and Yu, Xiaohui},
     title = {Existence results for strongly indefinite elliptic systems},
     journal = {Electronic Journal of Differential Equations},
     publisher = {mathdoc},
     volume = {2008},
     year = {2008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2008__2008__a95/}
}