Geodesic
Chebyshev sets and the continuity of metric projection
Izvestiâ vysših učebnyh zavedenij. Matematika, no. 9 (1970), pp. 78-82.

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     author = {E. V. Oshman},
     title = {Chebyshev sets and the continuity of metric projection},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {78--82},
     publisher = {mathdoc},
     number = {9},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1970_9_a10/}
}
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E. V. Oshman. Chebyshev sets and the continuity of metric projection. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 9 (1970), pp. 78-82. http://geodesic.mathdoc.fr/item/IVM_1970_9_a10/