%0 Journal Article %A K. Badura %T On a linear functional equation of second order %J Annales Polonici Mathematici %D 1970 %P 285-293 %V 24 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/ap-24-3-285-293/ %R 10.4064/ap-24-3-285-293 %G en %F 10_4064_ap_24_3_285_293