%0 Journal Article %A Borwein, J. M. %A Fabian, M. %T On Convex Functions Having Points of Gateaux Differentiability Which are Not Points of Fréchet Differentiability %J Canadian journal of mathematics %D 1993 %P 1121-1134 %V 45 %N 6 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1993-062-8/ %R 10.4153/CJM-1993-062-8 %F 10_4153_CJM_1993_062_8