@article{SM_1987_58_1_a12,
     author = {M. I. Vishik and S. B. Kuksin},
     title = {Perturbations of quasilinear elliptic equations and {Fredholm} manifolds},
     journal = {Sbornik. Mathematics},
     pages = {223--243},
     year = {1987},
     volume = {58},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1987_58_1_a12/}
}