@article{IVM_1999_6_a11,
     author = {E. N. Sosov},
     title = {On approximation properties of sets in special metric spaces},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {81--84},
     publisher = {mathdoc},
     number = {6},
     year = {1999},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1999_6_a11/}
}