%0 Journal Article
%A H. Światak
%T On some symmetrical equations of the form $f_1(x_1+...+x_n) = ∑_{i_1,...,i_n}) f_1(x_i_1)...f_n(x_i_n)$
%J Annales Polonici Mathematici
%D 1967
%P 271-286
%V 19
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/ap-19-3-271-286/
%R 10.4064/ap-19-3-271-286
%G en
%F 10_4064_ap_19_3_271_286