Levin, M.; Arro, V. A remark on optimal quadrature formulas with weight function. (Russian) Zbl 0397.41014 Izv. Akad. Nauk Ehst. SSR, Fiz. Mat. 27, 224-226 (1978). MSC: 41A55 41A50 65D32 65D30 PDFBibTeX XMLCite \textit{M. Levin} and \textit{V. Arro}, Izv. Akad. Nauk Èst. SSR, Fiz., Mat. 27, 224--226 (1978; Zbl 0397.41014)
Levin, M. I.; Girsovic, Ju. M.; Arro, V. K. Best quadrature formulas on sets of functions. (English. Russian original) Zbl 0341.41024 Sov. Math., Dokl. 17, 46-50 (1976); translation from Dokl. Akad. Nauk SSSR 226, 51-54 (1976). MSC: 41A55 41A50 PDFBibTeX XMLCite \textit{M. I. Levin} et al., Sov. Math., Dokl. 17, 46--50 (1976; Zbl 0341.41024); translation from Dokl. Akad. Nauk SSSR 226, 51--54 (1976)
Levin, M.; Arro, V.; Girsovic, Ju. Optimal quadrature formulae for some sets of functions. (Russian) Zbl 0329.65018 Izv. Akad. Nauk Ehst. SSR, Fiz. Mat. 25, 112-117 (1976). MSC: 65D30 41A55 PDFBibTeX XMLCite \textit{M. Levin} et al., Izv. Akad. Nauk Èst. SSR, Fiz., Mat. 25, 112--117 (1976; Zbl 0329.65018)
Levin, M.; Arro, V. The best quadrature formulae with weight function x. (Russian) Zbl 0321.65015 Izv. Akad. Nauk Ehst. SSR, Fiz. Mat. 23, 362-369 (1974). MSC: 65D30 41A35 PDFBibTeX XMLCite \textit{M. Levin} and \textit{V. Arro}, Izv. Akad. Nauk Èst. SSR, Fiz., Mat. 23, 362--369 (1974; Zbl 0321.65015)