%0 Journal Article %A Gossez, Jean-Pierre %A Lami Dozo, Enrique %T On an estimate for the principal eigenvalue of a linear elliptic problem %J Portugaliae mathematica %D 1982 %P 347-350 %V 41 %N 1-4 %I mathdoc %U http://geodesic.mathdoc.fr/item/PORMA_1982__41_1-4_115507/ %G en %F PORMA_1982__41_1-4_115507