@article{01589364,
title = {Monotone methods applied to some higher order boundary value problems.},
journal = {JIPAM. Journal of Inequalities in Pure \& Applied Mathematics [electronic only]},
volume = {2},
year = {2001},
zbl = {0979.34009},
language = {en},
url = {http://dml.mathdoc.fr/item/01589364}
}
Davis, John M.; Henderson, Johnny. Monotone methods applied to some higher order boundary value problems.. JIPAM. Journal of Inequalities in Pure & Applied Mathematics [electronic only], Tome 2 (2001) . http://gdmltest.u-ga.fr/item/01589364/