@article{MP_2005_a20,
     author = {V. Vikol and A. Apostolov},
     title = {{\CYRF}{\cyru}{\cyrn}{\cyrk}{\cyrc}{\cyri}{\cyro}{\cyrn}{\cyra}{\cyrl}{\cyrsftsn}{\cyrn}{\cyrery}{\cyre} {\cyrk}{\cyro}{\cyrr}{\cyrn}{\cyri}},
     journal = {Matematicheskoe Prosveshchenie},
     pages = {194--202},
     publisher = {mathdoc},
     year = {2005},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MP_2005_a20/}
}