%0 Journal Article %A Marek, I. %T A reduction method for approximate solving large elliptic systems %J Acta Universitatis Carolinae. Mathematica et Physica %D 1974 %P 97-102 %V 15 %N 1-2 %I mathdoc %U https://geodesic-test.mathdoc.fr/item/AUCMP_1974__15_1-2_a20/ %G en %F AUCMP_1974__15_1-2_a20