@article{05825764, title = {Positive solutions of }, journal = {Boundary Value Problems [electronic only]}, volume = {2011}, year = {2011}, doi = {10.1155/2011/456426}, zbl = {1213.34046}, language = {en}, url = {http://dml.mathdoc.fr/item/05825764} }
Feng, Meiqiang; Zhang, Xuemei; Yang, Xiaozhong. Positive solutions of . Boundary Value Problems [electronic only], Tome 2011 (2011) . doi : 10.1155/2011/456426. http://gdmltest.u-ga.fr/item/05825764/