Petr Gurka, Jan Lang, “Notes about s‐numbers for a Sobolev type embedding of order 4 and for a higher order integral operator”, Mathematische Nachrichten, 294, № 4, 2021, 731
Амиран Гогатишвили, Amiran Gogatishvili, Владимир Дмитриевич Степанов, Vladimir Dmitrievich Stepanov, “Редукционные теоремы для весовых интегральных неравенств на конусе монотонных функций”, Успехи математических наук, 68, № 4(412), 2013, 3
Hongliang Li, Qinxiu Sun, Xiao Yu, “Boundedness and compactness of Hardy-type integral operators on Lorentz-type spaces”, Forum Mathematicum, 30, № 4, 2018, 997
A Gogatishvili, V D Stepanov, “Reduction theorems for weighted integral inequalities on the cone of monotone functions”, Russ. Math. Surv., 68, № 4, 2013, 597
E. N. Lomakina, M. G. Nasyrova, “Estimates for the Norm of the Hardy Operator in Operator Ideals”, Sib Math J, 65, № 2, 2024, 328
Vladimir Dmitrievich Stepanov, Elena Pavlovna Ushakova, “Об аппроксимативных числах двумерного прямоугольного оператора Харди”, Математические заметки, 115, № 3, 2024, 422
D. V. Prokhorov, V. D. Stepanov, “On supremum operators”, Dokl. Math., 84, № 1, 2011, 457
V. D. Stepanov, E. P. Ushakova, “Approximation Numbers of the Two-Dimensional Rectangular Hardy Operator”, Math Notes, 115, № 3-4, 2024, 390