Rukasov, V. I. Approximation of continuous periodic functions by linear means of their Fourier series. (English) Zbl 0709.42520 Proc. Steklov Inst. Math. 180, 221-222 (1989). MSC: 42A10 Trigonometric approximation PDFBibTeX XMLCite \textit{V. I. Rukasov}, Proc. Steklov Inst. Math. 180, 221--222 (1989; Zbl 0709.42520)