Connections between symmetry or asymmetry of the equations $f_1(x_1+...+x_n) = ∑_{(i_1},...,i_n)} f(x_i_1)...f_n(x_i_n)$ and their solutions
Tom 19 / 1967
Annales Polonici Mathematici 19 (1967), 257-269
DOI: 10.4064/ap-19-3-257-269
