@article{05367988, title = {Multiplicity results via topological degree for impulsive boundary value problems under non-well-ordered upper and lower solution conditions.}, journal = {Boundary Value Problems [electronic only]}, volume = {2008}, year = {2008}, doi = {10.1155/2008/197205}, zbl = {1158.34015}, language = {en}, url = {http://dml.mathdoc.fr/item/05367988} }
Xian, Xu; O'Regan, Donal; Agarwal, R.P. Multiplicity results via topological degree for impulsive boundary value problems under non-well-ordered upper and lower solution conditions.. Boundary Value Problems [electronic only], Tome 2008 (2008) . doi : 10.1155/2008/197205. http://gdmltest.u-ga.fr/item/05367988/