Geodesic
On degree of approximation function classes in the space Lebesgue with anisotropic norm
Učënye zapiski Kazanskogo universiteta. Seriâ Fiziko-matematičeskie nauki, Kazanskii Gosudarstvennyi Universitet. Uchenye Zapiski. Seriya Fiziko-Matematichaskie Nauki, Tome 148 (2006) no. 2, pp. 5-17 
G. Akishev. On degree of approximation function classes in the space Lebesgue with anisotropic norm. Učënye zapiski Kazanskogo universiteta. Seriâ Fiziko-matematičeskie nauki, Kazanskii Gosudarstvennyi Universitet. Uchenye Zapiski. Seriya Fiziko-Matematichaskie Nauki, Tome 148 (2006) no. 2, pp. 5-17. http://geodesic.mathdoc.fr/item/UZKU_2006_148_2_a0/
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     title = {On degree of approximation function classes in the space {Lebesgue} with anisotropic norm},
     journal = {U\v{c}\"enye zapiski Kazanskogo universiteta. Seri\^a Fiziko-matemati\v{c}eskie nauki},
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Voir la notice du chapitre de livre provenant de la source Math-Net.Ru

There is the anisotropic space Lebesgue of periodic function in the paper. In the paper is obtained the estimate degree of approximation O. V. Besov's classes in anisotropic space Lebesgue by trigonometric polynomials with harmonics in hyperbolic crosses.

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