Akhazhanov, T. (2023) “Coefficients of multiple Fourier-Haar series and variational modulus of continuity: An Erratum to this article was published in issue 1(113) dated March 29, 2024”, Bulletin of the Karaganda University. Mathematics Series, 112(4), pp. 21–29. doi: 10.31489/2023m4/21-29.