%0 Journal Article %A Amster, P. %A Cárdenas Alzate, P.P. %T Existence of solutions for some nonlinear beam equations. %J Portugaliae mathematica %D 2006 %P 113-125 %V 63 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/PORMA_2006__63_1_53027/ %G en %F PORMA_2006__63_1_53027