Geodesic
Approximation of periodic functions of class $W_{p,\theta}^{(r_1,r_2)}$ by Fourier sums
Doklady Akademii Nauk, Tome 147 (1962) no. 3, pp. 519-522.

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     author = {{\CYRYU}. L. Bessonov},
     title = {Approximation of periodic functions of class $W_{p,\theta}^{(r_1,r_2)}$ by {Fourier} sums},
     journal = {Doklady Akademii Nauk},
     pages = {519--522},
     publisher = {mathdoc},
     volume = {147},
     number = {3},
     year = {1962},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1962_147_3_a0/}
}
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Ю. L. Bessonov. Approximation of periodic functions of class $W_{p,\theta}^{(r_1,r_2)}$ by Fourier sums. Doklady Akademii Nauk, Tome 147 (1962) no. 3, pp. 519-522. http://geodesic.mathdoc.fr/item/DAN_1962_147_3_a0/