Vakarchuk, S.B. (2022) “Widths of classes of functions in the weight space $L_{2,\gamma}(\mathbb{R}), \gamma=\exp(-x^2)$”, Ukrains’kyi Matematychnyi Zhurnal, 74(5), pp. 610–619. doi:10.37863/umzh.v74i5.7147.