%0 Journal Article %A Krystyna Szafraniec %T A difference method for a system of second order ordinary differential equations %J Annales Polonici Mathematici %D 1989 %P 1-10 %V 50 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/ap-50-1-1-10/ %R 10.4064/ap-50-1-1-10 %G en %F 10_4064_ap_50_1_1_10