%0 Journal Article
%A R. E. Ewing
%A S. D. Margenov
%A P. S. Vassilevski
%T Preconditioning the Biharmonic Equation by Multilevel Iterations
%J Mathematica balkanica
%D 1996
%P 121
%V 10
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MABA_1996_10_1_a11/
%F MABA_1996_10_1_a11