References
W. Blaschke, Kreis und Kugel, Walter de Gruyter & Co., 2nd. print (Berlin, 1956).
J. Daněs, On local and global moduli of convexity, Comm. Math. Univ. Carol., 17 (1976), 413–420.
N. Hadjisavvas, B. Nassopoulos and G. Pantelidis, On the renorming of a vector space endowed with two norms and the simultaneous best approximation problem, Math. Ann., 280 (1988), 549–557.
S. Kakutani, Some characterizations of euclidean spaces, Jap. J. Math., 16 (1939), 93–97.
E. R. Lorch, On certain implications which characterize Hilbert spaces, Ann. of Math., 49 (1948), 523–532.
M. L. Soriano, Aproximación Simultánea en Espacios Normados, Pub. Dpto. Matem. Univ. Extremadura, 23 (Badajoz, 1990).
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Benítez, C., Fernández, M. & Soriano, M.L. Suitable Norms for Simultaneous Approximation. Acta Mathematica Hungarica 74, 333–343 (1997). https://doi.org/10.1023/A:1006580405555
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DOI: https://doi.org/10.1023/A:1006580405555