[1]
KonsevichN.M. 2000. Estimates of the Best $M$-Term Trigonometric Approximations of the Classes $L_{β, p}^{ψ}$ of Periodic Functions of Many Variables in the Space $L_q$. Ukrains’kyi Matematychnyi Zhurnal. 52, 7 (Jul. 2000), 898-907.