@article{MP_2013_3_17_a13,
     author = {N. Nikolov and B. Stankovi\'c},
     title = {{\CYRO}{\cyrb} {\cyro}{\cyrd}{\cyrn}{\cyro}{\cyrm} {\cyrf}{\cyru}{\cyrn}{\cyrk}{\cyrc}{\cyri}{\cyro}{\cyrn}{\cyra}{\cyrl}{\cyrsftsn}{\cyrn}{\cyro}{\cyrm} {\cyru}{\cyrr}{\cyra}{\cyrv}{\cyrn}{\cyre}{\cyrn}{\cyri}{\cyri}},
     journal = {Matematicheskoe Prosveshchenie},
     pages = {192--195},
     year = {2013},
     volume = {Ser. 3, 17},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MP_2013_3_17_a13/}
}