@article{05637368, title = {Existence of three positive solutions for }, journal = {Discrete Dynamics in Nature and Society}, volume = {2009}, year = {2009}, doi = {10.1155/2009/538431}, zbl = {1177.34031}, language = {en}, url = {http://dml.mathdoc.fr/item/05637368} }
Guo, Yanping; Wei, Wenying; Chen, Yuerong. Existence of three positive solutions for . Discrete Dynamics in Nature and Society, Tome 2009 (2009) . doi : 10.1155/2009/538431. http://gdmltest.u-ga.fr/item/05637368/