Geodesic
Jackson's Order of Approximation in the Problem of Approximation of Continuous Set-Valued Map
Mathematica balkanica, Tome 4 (1990) no. 3-4, p. 396.

Voir la notice de l'article provenant de la source Mathematicac Balkanica website

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     author = {S. N. Nikolskii},
     title = {Jackson's {Order} of {Approximation} in the {Problem} of {Approximation} of {Continuous} {Set-Valued} {Map}},
     journal = {Mathematica balkanica},
     pages = {396},
     publisher = {mathdoc},
     volume = {4},
     number = {3-4},
     year = {1990},
     url = {http://geodesic.mathdoc.fr/item/MABA_1990_4_3-4_a17/}
}
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S. N. Nikolskii. Jackson's Order of Approximation in the Problem of Approximation of Continuous Set-Valued Map. Mathematica balkanica, Tome 4 (1990) no. 3-4, p. 396. http://geodesic.mathdoc.fr/item/MABA_1990_4_3-4_a17/