%0 Journal Article
%A J. Kisyński
%T On operator-valued solutions of d'Alembert's functional equation, I
%J Colloquium Mathematicum
%D 1971
%P 107-114
%V 23
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/cm-23-1-107-114/
%R 10.4064/cm-23-1-107-114
%G en
%F 10_4064_cm_23_1_107_114