@article{EJDE_2006__2006__a119,
     author = {Tisdell,  Christopher C.},
     title = {On the solvability of nonlinear first-order boundary-value problems},
     journal = {Electronic journal of differential equations},
     year = {2006},
     volume = {2006},
     zbl = {1117.34020},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2006__2006__a119/}
}