[1]
Hembars’kaS. B. and Zaderei P. V., “Best orthogonal trigonometric approximations of the Nikol’skii – Besov-type classes of periodic functions in the space $B_{\infty,1}$”, Ukr. Mat. Zhurn., vol. 74, no. 6, pp. 772 - 783, Jul. 2022.