@article{DAN_1976_226_4_a6,
     author = {E. P. Dolzhenko and E. A. Sevast'yanov},
     title = {On approximations of functions in the {Hausdorff} metric},
     journal = {Doklady Akademii Nauk},
     pages = {768--770},
     publisher = {mathdoc},
     volume = {226},
     number = {4},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1976_226_4_a6/}
}