@article{IVM_1990_12_a11,
     author = {A. V. Zheludev},
     title = {Letter to the editor},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {80--81},
     year = {1990},
     number = {12},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1990_12_a11/}
}