@article{MP_1936_1_7_a1,
     author = {S. I. Zetel},
     title = {{\CYRO} {\cyrn}{\cyre}{\cyrk}{\cyro}{\cyrt}{\cyro}{\cyrr}{\cyrery}{\cyrh} {\cyrs}{\cyrv}{\cyro}{\cyrishrt}{\cyrs}{\cyrt}{\cyrv}{\cyra}{\cyrh} {\cyro}{\cyrr}{\cyrt}{\cyro}{\cyrc}{\cyre}{\cyrn}{\cyrt}{\cyrr}{\cyri}{\cyrch}{\cyre}{\cyrs}{\cyrk}{\cyro}{\cyrg}{\cyro} {\cyri}~{\cyrt}{\cyra}{\cyrn}{\cyrg}{\cyre}{\cyrn}{\cyrc}{\cyri}{\cyra}{\cyrl}{\cyrsftsn}{\cyrn}{\cyro}{\cyrg}{\cyro} {\cyrt}{\cyrr}{\cyre}{\cyru}{\cyrg}{\cyro}{\cyrl}{\cyrsftsn}{\cyrn}{\cyri}{\cyrk}{\cyro}{\cyrv}},
     journal = {Matematicheskoe Prosveshchenie},
     pages = {12--20},
     year = {1936},
     volume = {Ser. 1, 7},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MP_1936_1_7_a1/}
}