%0 Journal Article %A Fučík, Svatopluk %T Remarks on the solvability and nonsolvability of weakly nonlinear equations %J Commentationes Mathematicae Universitatis Carolinae %D 1976 %P 61-70 %V 17 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMUC_1976__17_1_a4/ %G en %F CMUC_1976__17_1_a4