%0 Journal Article %A Kolomý, Josef %T On the differentiability of operators and convex functionals %J Commentationes Mathematicae Universitatis Carolinae %D 1968 %P 441-454 %V 09 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMUC_1968__9_3_a3/ %G en %F CMUC_1968__9_3_a3