Bajborodov, S. P. Approximation of functions by Vallee-Poussin sums. (English) Zbl 0471.41013 Math. Notes 27, 19-27 (1980). MSC: 41A30 41A25 42A16 PDFBibTeX XMLCite \textit{S. P. Bajborodov}, Math. Notes 27, 19--27 (1980; Zbl 0471.41013) Full Text: DOI
Bajborodov, S. P. Die Approximation von Funktionen vermittels de la Vallee-Poussinscher Summen. (Russian) Zbl 0445.41005 Mat. Zametki 27, 33-48 (1980). MSC: 41A25 PDFBibTeX XMLCite \textit{S. P. Bajborodov}, Mat. Zametki 27, 33--48 (1980; Zbl 0445.41005)