%0 Journal Article %A Armentano, María G. %A Durán, Ricardo G. %T Asymptotic lower bounds for eigenvalues by nonconforming finite element methods %J Electronic transactions on numerical analysis %D 2004 %P 93-101 %V 17 %I mathdoc %U http://geodesic.mathdoc.fr/item/ETNA_2004__17__a9/ %G en %F ETNA_2004__17__a9