@article{IVM_2002_1_a13,
     author = {E. N. Sosov},
     title = {Letter to the editors: {``On} the $\epsilon$-core of a~bounded set in a~special metric space''},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {81--82},
     publisher = {mathdoc},
     number = {1},
     year = {2002},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2002_1_a13/}
}