%0 Journal Article
%A F. Brezzi
%A W.W. Hager
%A P.A. Raviart
%T Error Estimates for the Finite Element Solution of Variational Inequalities. Part I. Primal Theory.
%J Numerische Mathematik
%D 1977
%P 431-444
%V 28
%I mathdoc
%U http://geodesic.mathdoc.fr/item/NUMA_1977__28_132496/
%F NUMA_1977__28_132496