@article{MZ_1971__121_171563,
     author = {Bui An Ton},
     title = {Pseudo-Monotone {Operators} in {Banach} {Spaces} and {Nonlinear} {Elliptic} {Equations.}},
     journal = {Mathematische Zeitschrift},
     pages = {243--252},
     publisher = {mathdoc},
     volume = {121},
     year = {1971},
     zbl = {0222.47018},
     url = {http://geodesic.mathdoc.fr/item/MZ_1971__121_171563/}
}