@article{MZM_1990_47_4_a20,
     author = {A. V. Shkred},
     title = {Letter to the {Editor}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {160},
     publisher = {mathdoc},
     volume = {47},
     number = {4},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1990_47_4_a20/}
}