@article{DAN_1964_155_2_a5,
     author = {E. V. Maikov},
     title = {$\tau$-continuity and $\tau$-differentiability of a functional},
     journal = {Doklady Akademii Nauk},
     pages = {266--269},
     publisher = {mathdoc},
     volume = {155},
     number = {2},
     year = {1964},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1964_155_2_a5/}
}