%0 Journal Article %A Drábek, Pavel %T Solvability of nonlinear problems at resonance %J Commentationes Mathematicae Universitatis Carolinae %D 1982 %P 359-368 %V 23 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMUC_1982__23_2_a12/ %G en %F CMUC_1982__23_2_a12