@article{10_4064_ap_59_3_203_213,
     author = {Piotr Fija{\l}kowski},
     title = {On a class of nonlinear ellipticequations in {Hilbert} spaces},
     journal = {Annales Polonici Mathematici},
     pages = {203--213},
     publisher = {mathdoc},
     volume = {59},
     number = {3},
     year = {1994},
     doi = {10.4064/ap-59-3-203-213},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-59-3-203-213/}
}