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References
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Magaril-Ilyaev G. G., Tikhomirov V. M., Vypuklyi analiz i ego prilozheniya, URSS, M., 2003, 175 pp. |
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Fikhtengolts G. M., Kurs differentsialnogo i integralnogo ischisleniya, v. 1, Fizmatlit, M., 2001, 680 pp. |
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Korneichuk N. P., Ekstremalnye zadachi teorii priblizheniya, Nauka, M., 1976, 320 pp.  |
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Magaril-Il'yaev G. G., Osipenko K. Yu., Tikhomirov V. M., “Optimal recovery and extremum theory”, Computational Methods and Function Theory, 2002, no. 2, 87–112 |
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Krein M. G., “K teorii nailuchshikh priblizhenii periodicheskikh funktsii”, Dokl. AN SSSR, 18:4/5 (1938), 245–251 |
