%0 Journal Article %A Baker, John A. %T An Analogue of the Wave Equation and Certain Related Functional Equations %J Canadian mathematical bulletin %D 1969 %P 837-846 %V 12 %N 6 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1969-109-6/ %R 10.4153/CMB-1969-109-6 %F 10_4153_CMB_1969_109_6