@article{MP_1961_2_6_a11,
     author = {D. D. Ivlev},
     title = {{\CYRO} {\cyrd}{\cyrv}{\cyro}{\cyrishrt}{\cyrn}{\cyrery}{\cyrh} {\cyrch}{\cyri}{\cyrs}{\cyrl}{\cyra}{\cyrh} {\cyri} {\cyri}{\cyrh} {\cyrf}{\cyru}{\cyrn}{\cyrk}{\cyrc}{\cyri}{\cyrya}{\cyrh}},
     journal = {Matematicheskoe Prosveshchenie},
     pages = {197--203},
     year = {1961},
     volume = {Ser. 2, 6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MP_1961_2_6_a11/}
}