%0 Journal Article
%A P. S. Vassilevski
%A S. I. Petrova
%A R. D. Lazarov
%T Preconditioning Elliptic Problems on Grids with Multilevel Local Refinement
%J Mathematica balkanica
%D 1994
%P 179
%V 8
%N 2-3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MABA_1994_8_2-3_a4/
%F MABA_1994_8_2-3_a4