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Chan, K. Y.; Chen, Y. M.; Liu, M. C.; Ng, S. M. An example on strong unicity constants in trigonometric approximation. (English) Zbl 0491.42001 Proc. Am. Math. Soc. 84, 79-84 (1982). MSC: 42A10 41A10 41A50 PDFBibTeX XMLCite \textit{K. Y. Chan} et al., Proc. Am. Math. Soc. 84, 79--84 (1982; Zbl 0491.42001) Full Text: DOI