Bodraya V. I.
Approximation of Classes of ψ-Integrals of Periodic Functions of Many Variables by Rectangular Linear Means of Their Fourier Series
Ukr. Mat. Zh. - 2005. - 57, № 4. - pp. 564–570
We obtain asymptotic equalities for deviations of rectangular linear means of Fourier series on classes of ψ-integrals of multivariable functions