%0 Journal Article %A A. Smajdor %A W. Smajdor %T Multi-valued solutions of a functional equation %J Annales Polonici Mathematici %D 1983 %P 89-97 %V 41 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/ap-41-2-89-97/ %R 10.4064/ap-41-2-89-97 %G en %F 10_4064_ap_41_2_89_97