[1]
Jurakhonov О. 2018. 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, 1 (Mar. 2018), 70–75.