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@article{KUIPM_1973_a15, author = {V. N. Spevakov}, title = {Absolute summation of orthogonal series by {Riesz} methods}, journal = {Issledovaniya po Prikladnoi Matematike i Informatike}, pages = {109--116}, publisher = {mathdoc}, year = {1973}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/KUIPM_1973_a15/} }
V. N. Spevakov. Absolute summation of orthogonal series by Riesz methods. Issledovaniya po Prikladnoi Matematike i Informatike, Issledovaniya po Prikladnoi Matematike (1973), pp. 109-116. http://geodesic.mathdoc.fr/item/KUIPM_1973_a15/