%0 Journal Article
%A H.B. KELLER
%T On the Accuracy of Finite Difference Approximations to the Eigenvalues of Differential and Integral Operators.
%J Numerische Mathematik
%D 1965
%P 412-419
%V 7
%I mathdoc
%U http://geodesic.mathdoc.fr/item/NUMA_1965__7_131679/
%F NUMA_1965__7_131679