@article{05237423,
title = {Multiple nonnegative solutions for BVPs of fourth-order difference equations.},
journal = {Advances in Difference Equations [electronic only]},
volume = {2006},
year = {2006},
doi = {10.1155/ADE/2006/89585},
zbl = {1139.39306},
language = {en},
url = {http://dml.mathdoc.fr/item/05237423}
}
Sun, Jian-Ping. Multiple nonnegative solutions for BVPs of fourth-order difference equations.. Advances in Difference Equations [electronic only], Tome 2006 (2006) . doi : 10.1155/ADE/2006/89585. http://gdmltest.u-ga.fr/item/05237423/