@article{MP_1961_2_6_a18,
     author = {I. I. Zhogin},
     title = {{\CYRO} {\cyrs}{\cyrr}{\cyre}{\cyrd}{\cyrn}{\cyri}{\cyrh}},
     journal = {Matematicheskoe Prosveshchenie},
     pages = {217--226},
     year = {1961},
     volume = {Ser. 2, 6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MP_1961_2_6_a18/}
}