For citations:

Dobrovol’skii M.N., Dobrovol’skii N.N., Dobrovol’skii N.M. On the accuracy of quadrature formulas with optimal parallelepipedal grids. Chebyshevskii Sbornik. 2023;24(4):335-340. (In Russ.) https://doi.org/10.22405/2226-8383-2023-24-4-335-340