@article{MP_2009_a11,
     author = {F. V. Petrov},
     title = {{\CYRV}{\cyrp}{\cyri}{\cyrs}{\cyra}{\cyrn}{\cyrn}{\cyrery}{\cyre} {\cyrch}{\cyre}{\cyrt}{\cyrery}{\cyrr}{\cyryo}{\cyrh}{\cyru}{\cyrg}{\cyro}{\cyrl}{\cyrsftsn}{\cyrn}{\cyri}{\cyrk}{\cyri} {\cyri} {\cyrt}{\cyrr}{\cyra}{\cyrp}{\cyre}{\cyrc}{\cyri}{\cyri} {\cyrv}~{\cyra}{\cyrb}{\cyrs}{\cyro}{\cyrl}{\cyryu}{\cyrt}{\cyrn}{\cyro}{\cyrishrt} {\cyrg}{\cyre}{\cyro}{\cyrm}{\cyre}{\cyrt}{\cyrr}{\cyri}{\cyri}},
     journal = {Matematicheskoe Prosveshchenie},
     pages = {149--154},
     publisher = {mathdoc},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MP_2009_a11/}
}