%0 Journal Article %A A. Ioffe %T Typical Convexity (Concavity) of Dini-Hadamard Upper (Lower) Directional Derivatives of Functions on Separable Banach Spaces %J Journal of convex analysis %D 2010 %P 1019-1032 %V 17 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/JCA_2010_17_3_JCA_2010_17_3_a17/ %F JCA_2010_17_3_JCA_2010_17_3_a17