%0 Journal Article %A M. I. Vishik %A S. B. Kuksin %T Perturbations of quasilinear elliptic equations and Fredholm manifolds %J Sbornik. Mathematics %D 1987 %P 223-243 %V 58 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1987_58_1_a12/ %G en %F SM_1987_58_1_a12