%0 Journal Article %A E. V. Maikov %T $\tau$-continuity and $\tau$-differentiability of a functional %J Doklady Akademii Nauk %D 1964 %P 266-269 %V 155 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1964_155_2_a5/ %G ru %F DAN_1964_155_2_a5