[1]
Babenko, V.F., Korneichuk, N.P., Kofanov, V.A. and Pichugov, S.A. 2000. Inequalities for upper bounds of functionals on the classes $W^r H^{ω}$ and their applications. Ukrains’kyi Matematychnyi Zhurnal. 52, 1 (Jan. 2000), 66-84.