Geodesic
Sharp inequalities for best mean square approximations in a~space of Bessel potentials
Izvestiâ vysših učebnyh zavedenij. Matematika, no. 1 (1982), pp. 83-86.

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@article{IVM_1982_1_a14,
     author = {V. Yu. Popov},
     title = {Sharp inequalities for best mean square approximations in a~space of {Bessel} potentials},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {83--86},
     publisher = {mathdoc},
     number = {1},
     year = {1982},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1982_1_a14/}
}
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V. Yu. Popov. Sharp inequalities for best mean square approximations in a~space of Bessel potentials. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 1 (1982), pp. 83-86. http://geodesic.mathdoc.fr/item/IVM_1982_1_a14/