%0 Journal Article %A Baker, John A. %T Functional Equations, Distributions and Approximate Identities %J Canadian journal of mathematics %D 1990 %P 696-708 %V 42 %N 4 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1990-036-1/ %R 10.4153/CJM-1990-036-1 %F 10_4153_CJM_1990_036_1