@article{05312516, title = {Triple positive solutions of fourth-order four-point boundary value problems for }, journal = {Advances in Difference Equations [electronic only]}, volume = {2008}, year = {2008}, doi = {10.1155/2008/496078}, zbl = {1149.34012}, language = {en}, url = {http://dml.mathdoc.fr/item/05312516} }
Feng, Mei-Qiang; Li, Xiang-Gui; Ge, Wei-Gao. Triple positive solutions of fourth-order four-point boundary value problems for . Advances in Difference Equations [electronic only], Tome 2008 (2008) . doi : 10.1155/2008/496078. http://gdmltest.u-ga.fr/item/05312516/