Holt, Jeffrey J. A class of extremal functions and trigonometric polynomials. (English) Zbl 0871.42002 J. Approximation Theory 88, No. 3, 275-303 (1997). Reviewer: N.Bozhinov (Sofia) MSC: 42A10 30D10 42A38 PDFBibTeX XMLCite \textit{J. J. Holt}, J. Approx. Theory 88, No. 3, 275--303 (1997; Zbl 0871.42002) Full Text: DOI Link
Holt, Jeffrey J.; Vaaler, Jeffrey D. The Beurling-Selberg extremal functions for a ball in Euclidean space. (English) Zbl 0859.30029 Duke Math. J. 83, No. 1, 203-248 (1996). Reviewer: M.Hervé (Paris) MSC: 30D15 32A15 46E22 PDFBibTeX XMLCite \textit{J. J. Holt} and \textit{J. D. Vaaler}, Duke Math. J. 83, No. 1, 203--248 (1996; Zbl 0859.30029) Full Text: DOI