%0 Journal Article %A E. V. Oshman %T Chebyshev sets, continuity of the metric projection and certain geometric properties of the unit sphere in a~Banach space %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 1969 %P 38-46 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVM_1969_4_a7/ %G ru %F IVM_1969_4_a7