@article{urn:eudml:doc:38728,
title = {Upper and lower solutions for first order problems with nonlinear boundary conditions.},
journal = {Extracta Mathematicae},
volume = {18},
year = {2003},
pages = {153-160},
zbl = {1086.34509},
mrnumber = {MR2002443},
language = {en},
url = {http://dml.mathdoc.fr/item/urn:eudml:doc:38728}
}
Franco, Daniel; Nieto, Juan J.; O'Regan, Donal. Upper and lower solutions for first order problems with nonlinear boundary conditions.. Extracta Mathematicae, Tome 18 (2003) pp. 153-160. http://gdmltest.u-ga.fr/item/urn:eudml:doc:38728/