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Translated from Ukrainskii Matematicheskii Zhurnal, Vol. 31, No. 1, pp. 74–82, January–February, 1979.
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Shabozov, M. Estimation of the error of cubature formulas, exact for splines, on certain classes of functions of two variables. Ukr Math J 31, 57–64 (1979). https://doi.org/10.1007/BF01086442
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DOI: https://doi.org/10.1007/BF01086442