%0 Journal Article
%A S. Czerwik
%T On sign-preserving solutions of a linear functional equation
%J Annales Polonici Mathematici
%D 1968
%P 73-79
%V 20
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/ap-20-1-73-79/
%R 10.4064/ap-20-1-73-79
%G en
%F 10_4064_ap_20_1_73_79