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Translated from Ukrainskii Matematicheskii Zhurnal, Vol. 32, No. 3, pp. 388–392, May–June, 1980.
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Ligun, A.A. Approximation of periodic functions by splines of minimal defect. Ukr Math J 32, 259–261 (1980). https://doi.org/10.1007/BF01089766
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DOI: https://doi.org/10.1007/BF01089766