%0 Journal Article %A Barros-Neto, Jose %T On the Smoothness of General Kernels %J Canadian journal of mathematics %D 1966 %P 443-448 %V 18 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1966-047-4/ %R 10.4153/CJM-1966-047-4 %F 10_4153_CJM_1966_047_4