[1]
Hrabova, U.Z., Kalchuk, I.V. and Stepanyuk, T.A. 2017. Approximation of functions from the classes $W_{β}^r H^{α }$ by Weierstrass integrals. Ukrains’kyi Matematychnyi Zhurnal. 69, 4 (Apr. 2017), 510-519.