@article{TRSPY_1997_219_a24,
     author = {O. A. Timoshin},
     title = {The {Best} {Approximation} of {a~Derivative} and {Analogs} of {Landau's} {Inequality} in {a~Half-Space}},
     journal = {Informatics and Automation},
     pages = {387--399},
     publisher = {mathdoc},
     volume = {219},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1997_219_a24/}
}