Jurakhonov О.А. “О.А. Jurakhonov The Exact Values of the Upper Bounds for Approximation in the Mean of Some Classes of Ьivariate Functions Bу Triangular Fourier-Hermite Sums”. Bulletin of L.N. Gumilyov Eurasian National University. Mathematics, computer science, mechanics series 122, no. 1 (March 30, 2018): 70–75. Accessed November 21, 2024. https://bulmathmc.enu.kz/index.php/main/article/view/19.