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Krafft, Olaf; Schaefer, Martin Exact Elfving-minimax designs for quadratic regression. (English) Zbl 0824.62064 Stat. Sin. 5, No. 2, 475-484 (1995). MSC: 62K05 62J02 PDFBibTeX XMLCite \textit{O. Krafft} and \textit{M. Schaefer}, Stat. Sin. 5, No. 2, 475--484 (1995; Zbl 0824.62064)