@article{05897640, title = {Multiple solutions of }, journal = {Boundary Value Problems [electronic only]}, volume = {2011}, year = {2011}, doi = {10.1155/2011/214289}, zbl = {1221.35177}, language = {en}, url = {http://dml.mathdoc.fr/item/05897640} }
Zhang, Jing; Xue, Xiaoping. Multiple solutions of . Boundary Value Problems [electronic only], Tome 2011 (2011) . doi : 10.1155/2011/214289. http://gdmltest.u-ga.fr/item/05897640/