@article{KVANT_2015_1_a19,
     author = {A. Chernoutsan},
     title = {{\CYRZ}{\cyra}{\cyrd}{\cyra}{\cyrch}{\cyri}
},
     journal = {Kvant},
     pages = {46--50},
     publisher = {mathdoc},
     number = {1},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/KVANT_2015_1_a19/}
}