Abdullayev, F., Anatolii Serdyuk, and A. Shidlich. 2021. “Widths of Functional Classes Defined by Majorants of Generalized Moduli of Smoothness in the Spaces ${\mathcal S}^{p}$”. Ukrains’kyi Matematychnyi Zhurnal 73 (6): 723-37. https://doi.org/10.37863/umzh.v73i6.6432.