Knopp kernels for series summing by a regular positive matrix
English version (Springer): Ukrainian Mathematical Journal 26 (1974), no. 4, pp 468-473.
Citation Example: Sokolenko A. I. Knopp kernels for series summing by a regular positive matrix // Ukr. Mat. Zh. - 1974. - 26, № 4. - pp. 565–572.
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