%0 Journal Article
%A P. Neittaanmäki
%A J. Saranen
%T On Finite Element Approximation of the Gradient for Solution of Poisson Equation.
%J Numerische Mathematik
%D 1981
%P 333-338
%V 37
%I mathdoc
%U http://geodesic.mathdoc.fr/item/NUMA_1981__37_132734/
%F NUMA_1981__37_132734