Burenkov, V. I.; Gol’dman, M. L. On extension of \(L_ p-\)functions. (English) Zbl 0476.46029 Proc. Steklov Inst. Math. 150, 33-53 (1981). MSC: 46E35 46E30 46A22 PDFBibTeX XMLCite \textit{V. I. Burenkov} and \textit{M. L. Gol'dman}, Proc. Steklov Inst. Math. 150, 33--53 (1981; Zbl 0476.46029)
Besov, O. V. Intercellular averages and an error estimate for cubature formulas in Sobolev spaces and their generalizations. (English. Russian original) Zbl 0442.46024 Proc. Steklov Inst. Math. 143, 45-60 (1980); translation from Tr. Mat. Inst. Steklova 143, 42-56 (1977). MSC: 46E35 46E30 41A55 PDFBibTeX XMLCite \textit{O. V. Besov}, Proc. Steklov Inst. Math. 143, 45--60 (1977; Zbl 0442.46024); translation from Tr. Mat. Inst. Steklova 143, 42--56 (1977)