@article{TM_1997_219_a15,
     author = {M. I. Karlov},
     title = {Chebyshev {Layer} of {Manifolds} in {a~Hilbert} {Space}},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {235--248},
     publisher = {mathdoc},
     volume = {219},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1997_219_a15/}
}