%0 Journal Article %A Franke, Jens %A Runst, Thomas %T Nonlinear perturbations of linear non-invertible boundary value problems in function spaces of type $B^s_{p,q}$ and $F^s_{p,q}$ %J Czechoslovak Mathematical Journal %D 1988 %P 623-641 %V 38 %N 4 %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1988.102259/ %R 10.21136/CMJ.1988.102259 %G en %F 10_21136_CMJ_1988_102259