%0 Journal Article %A Janusz Traple %T Boundary value problem for differential and difference second order systems %J Annales Polonici Mathematici %D 1977 %P 167-186 %V 35 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/ap-35-2-167-186/ %R 10.4064/ap-35-2-167-186 %G en %F 10_4064_ap_35_2_167_186