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Dzyubenko, G. A.; Gilewicz, J.; Shevchuk, I. A. Piecewise monotone pointwise approximation. (English) Zbl 0912.41007 Constructive Approximation 14, No. 3, 311-348 (1998). Reviewer: D.Leviatan (Tel Aviv) MSC: 41A10 41A25 41A29 PDFBibTeX XMLCite \textit{G. A. Dzyubenko} et al., Constr. Approx. 14, No. 3, 311--348 (1998; Zbl 0912.41007) Full Text: DOI
Gilewicz, J.; Shevchuk, I. A. Comonotone approximation. (Russian. English summary) Zbl 0908.41003 Fundam. Prikl. Mat. 2, No. 2, 319-363 (1996). Reviewer: A.Martínez Finkelshtein (Almeria) MSC: 41A10 41A29 PDFBibTeX XMLCite \textit{J. Gilewicz} and \textit{I. A. Shevchuk}, Fundam. Prikl. Mat. 2, No. 2, 319--363 (1996; Zbl 0908.41003)