@article{IVM_1999_11_a2,
     author = {M. N. Gavrilyuk},
     title = {On the covering of disks in the {Bieberbach{\textendash}Eilenberg} class},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {20--23},
     year = {1999},
     number = {11},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1999_11_a2/}
}