@article{EJDE_2002__2002__a149,
     author = {Costa, David G. and Guo, Yuxia and Ramos, Miguel},
     title = {Existence and multiplicity results for nonlinear elliptic problems in $\bbfR^N$ with an indefinite functional},
     journal = {Electronic Journal of Differential Equations},
     publisher = {mathdoc},
     volume = {2002},
     year = {2002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2002__2002__a149/}
}