@article{KVANT_2017_4_a9,
     author = {A. A. Leonovich},
     title = {{\CYRF}{\cyri}{\cyrz}{\cyri}{\cyrk}{\cyra}+{\cyrf}{\cyrl}{\cyro}{\cyrr}{\cyra}},
     journal = {Kvant},
     pages = {32--33},
     publisher = {mathdoc},
     number = {4},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/KVANT_2017_4_a9/}
}