%0 Journal Article %A Drábek, Pavel %T Existence and multiplicity results for some weakly nonlinear elliptic problems at resonance %J Časopis pro pěstování matematiky %D 1983 %P 272-284 %V 108 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/CPM.1983.118175/ %R 10.21136/CPM.1983.118175 %G en %F 10_21136_CPM_1983_118175