%0 Journal Article
%A M.R. OSBORNE
%A G.A. WATSON
%T On Estimating Best Approximations of Functions Defined by Differential Equations.
%J Numerische Mathematik
%D 1969
%P 199-206
%V 13
%I mathdoc
%U http://geodesic.mathdoc.fr/item/NUMA_1969__13_131910/
%F NUMA_1969__13_131910