@article{05312424, title = {Multiplicity of positive periodic solutions of singular semipositone third-order boundary value problems.}, journal = {Boundary Value Problems [electronic only]}, volume = {2008}, year = {2008}, doi = {10.1155/2008/574842}, zbl = {1149.34016}, language = {en}, url = {http://dml.mathdoc.fr/item/05312424} }
Sun, Yigang. Multiplicity of positive periodic solutions of singular semipositone third-order boundary value problems.. Boundary Value Problems [electronic only], Tome 2008 (2008) . doi : 10.1155/2008/574842. http://gdmltest.u-ga.fr/item/05312424/