Geodesic
The best net, the best section, and the Chebyshev center of a bounded set in an infinite-dimensional Lobachevskii space
Izvestiâ vysših učebnyh zavedenij. Matematika, no. 9 (1999), pp. 42-47 
E. N. Sosov. The best net, the best section, and the Chebyshev center of a bounded set in an infinite-dimensional Lobachevskii space. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 9 (1999), pp. 42-47. http://geodesic.mathdoc.fr/item/IVM_1999_9_a5/
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     title = {The best net, the best section, and the {Chebyshev} center of a~bounded set in an infinite-dimensional {Lobachevskii} space},
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}
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