%0 Journal Article %A Sze-Ping Wong %T Preconditioning conforming finite element methods for treating Dirichlet boundary conditions. I. %J Numerische Mathematik %D 1992 %P 391-412 %V 62 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/NUMA_1992__62_1_133657/ %F NUMA_1992__62_1_133657