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@article{DAN_1963_153_3_a0, author = {S. Ya. Al'per}, title = {On the best mean first-degree approximation of analytic functions on circles}, journal = {Doklady Akademii Nauk}, pages = {503--506}, publisher = {mathdoc}, volume = {153}, number = {3}, year = {1963}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1963_153_3_a0/} }
S. Ya. Al'per. On the best mean first-degree approximation of analytic functions on circles. Doklady Akademii Nauk, Tome 153 (1963) no. 3, pp. 503-506. http://geodesic.mathdoc.fr/item/DAN_1963_153_3_a0/