@article{ZVMMF_1990_30_2_a15,
     author = {Yu. I. Khudak},
     title = {On the best one-layer clearing covering for a frequency interval},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {325--327},
     year = {1990},
     volume = {30},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1990_30_2_a15/}
}