We obtain in this paper a multiplicity result for strongly indefinite semilinear elliptic systems in bounded domains as well as in $\Bbb R^N$.
@article{119004, author = {Yang Jianfu}, title = {Multiple solutions of semilinear elliptic systems}, journal = {Commentationes Mathematicae Universitatis Carolinae}, volume = {39}, year = {1998}, pages = {257-268}, zbl = {0940.35072}, mrnumber = {1651942}, language = {en}, url = {http://dml.mathdoc.fr/item/119004} }
Jianfu, Yang. Multiple solutions of semilinear elliptic systems. Commentationes Mathematicae Universitatis Carolinae, Tome 39 (1998) pp. 257-268. http://gdmltest.u-ga.fr/item/119004/
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