@article{10_4064_ap_56_2_149_156,
     author = {Piotr Fija{\l}kowski},
     title = {On the solvability of nonlinear elliptic equations in {Sobolev} spaces},
     journal = {Annales Polonici Mathematici},
     pages = {149--156},
     publisher = {mathdoc},
     volume = {56},
     number = {2},
     year = {1991},
     doi = {10.4064/ap-56-2-149-156},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-56-2-149-156/}
}