@article{MP_2012_3_16_a11,
     author = {E. A. Gorin},
     title = {{\CYRZ}{\cyra}{\cyrd}{\cyra}{\cyrch}{\cyra} {\cyrch}{\cyra}{\cyrs}{\cyro}{\cyrv}{\cyrshch}{\cyri}{\cyrk}{\cyra}},
     journal = {Matematicheskoe Prosveshchenie},
     pages = {145--150},
     year = {2012},
     volume = {Ser. 3, 16},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MP_2012_3_16_a11/}
}