@article{TIMM_2018_24_4_a2,
     author = {V. V. Arestov},
     title = {Best {Uniform} {Approximation} of the {Differentiation} {Operator} by {Operators} {Bounded} in the {Space~}$L_2$},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {34--56},
     year = {2018},
     volume = {24},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_2018_24_4_a2/}
}