@article{KVANT_2017_1_a6,
     author = {A. A. Leonovich},
     title = {{\CYRF}{\cyri}{\cyrz}{\cyri}{\cyrk}{\cyra}+{\cyrf}{\cyra}{\cyru}{\cyrn}{\cyra}},
     journal = {Kvant},
     pages = {24--25},
     year = {2017},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/KVANT_2017_1_a6/}
}