@article{EJDE_2004__2004__a197,
     author = {Le,  Vy Khoi and Schmitt,  Klaus},
     title = {Sub-supersolution theorems for quasilinear elliptic problems: {A} variational approach},
     journal = {Electronic journal of differential equations},
     year = {2004},
     volume = {2004},
     zbl = {1134.35308},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2004__2004__a197/}
}