%0 Journal Article %A Elias A. Lipitakis %A George A. Gravvanis %T The numerical solution of large finite element systems by explicit preconditioning semi-direct methods %J Ευκλείδης Γ %D 1992 %P 63-82 %V 32 %I mathdoc %U http://geodesic.mathdoc.fr/item/EUG_1992__32_a10/ %G gr %F EUG_1992__32_a10