@article{EJDE_1999__1999__a132,
     author = {Efendiev, M.A. and Schmitz, Hermann and Wendland, Wolfgang L.},
     title = {On some nonlinear potential problems},
     journal = {Electronic Journal of Differential Equations},
     publisher = {mathdoc},
     volume = {1999},
     year = {1999},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_1999__1999__a132/}
}