%0 Journal Article
%A W.G. Kolata
%T Approximation in Variationally Posed Eigenvalue Problems.
%J Numerische Mathematik
%D 1977
%P 159-172
%V 29
%I mathdoc
%U http://geodesic.mathdoc.fr/item/NUMA_1977__29_132511/
%F NUMA_1977__29_132511