@article{MZM_1969_5_4_a5,
     author = {S. A. Telyakovskii},
     title = {A problem suggested by {R.~Boas}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {437--440},
     publisher = {mathdoc},
     volume = {5},
     number = {4},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1969_5_4_a5/}
}