Geodesic
Best possible localization conditions for rectangular Ces\'aro means and Abel means in restricted summability of a~multiple trigonometric Fourier series in Liouville classes
Izvestiya. Mathematics , Tome 7 (1973) no. 3, pp. 589-599.

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In the paper the best possible localization conditions are established for the rectangular Cesáro means of an arbitrary positive order and the means of Abel's method for the bounded summation of a multiple trigonometric Fourier series in the Liouville classes $L_p^{*\gamma}(G)$. 
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     author = {N. Ch. Krutitskaya},
     title = {Best possible localization conditions for rectangular {Ces\'aro} means and {Abel} means in restricted summability of a~multiple trigonometric {Fourier} series in {Liouville} classes},
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N. Ch. Krutitskaya. Best possible localization conditions for rectangular Ces\'aro means and Abel means in restricted summability of a~multiple trigonometric Fourier series in Liouville classes. Izvestiya. Mathematics , Tome 7 (1973) no. 3, pp. 589-599. http://geodesic.mathdoc.fr/item/IM2_1973_7_3_a6/

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