@article{IVM_1968_9_a13,
     author = {G. O. Yaroshevich},
     title = {Letter to the editors},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {122},
     year = {1968},
     number = {9},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1968_9_a13/}
}