%0 Journal Article %A M. Kuczma %T On some functional equations containing iterations of the unknown functions %J Annales Polonici Mathematici %D 1961 %P 1-5 %V 11 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/ap-11-1-1-5/ %R 10.4064/ap-11-1-1-5 %G en %F 10_4064_ap_11_1_1_5