@article{05626173, title = {Infinitely many solutions of strongly indefinite semilinear elliptic systems.}, journal = {Boundary Value Problems [electronic only]}, volume = {2009}, year = {2009}, doi = {10.1155/2009/865408}, zbl = {1179.35112}, language = {en}, url = {http://dml.mathdoc.fr/item/05626173} }
Chen, Kuan-Ju. Infinitely many solutions of strongly indefinite semilinear elliptic systems.. Boundary Value Problems [electronic only], Tome 2009 (2009) . doi : 10.1155/2009/865408. http://gdmltest.u-ga.fr/item/05626173/