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Zizler, Václav E. One theorem on rotundity and smoothness of separable Banach spaces. Commentationes Mathematicae Universitatis Carolinae, Tome 9 (1968) no. 4, pp. 637-640. http://geodesic.mathdoc.fr/item/CMUC_1968_9_4_a12/
@article{CMUC_1968_9_4_a12,
author = {Zizler, V\'aclav E.},
title = {One theorem on rotundity and smoothness of separable {Banach} spaces},
journal = {Commentationes Mathematicae Universitatis Carolinae},
pages = {637--640},
year = {1968},
volume = {9},
number = {4},
mrnumber = {0256139},
zbl = {0182.45201},
language = {en},
url = {http://geodesic.mathdoc.fr/item/CMUC_1968_9_4_a12/}
}
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