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@article{TM_1971_109_a0, author = {P. V. Galkin}, title = {Estimate for {Lebesgue} constants}, journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova}, pages = {3--5}, publisher = {mathdoc}, volume = {109}, year = {1971}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/TM_1971_109_a0/} }
P. V. Galkin. Estimate for Lebesgue constants. Trudy Matematicheskogo Instituta imeni V.A. Steklova, Приближение периодических функций, Tome 109 (1971), pp. 3-5. http://geodesic.mathdoc.fr/item/TM_1971_109_a0/