@article{MP_1936_1_5_a7,
     author = {A. S. Kovan'ko},
     title = {{\CYRO}{\cyrb}{\cyro}{\cyrb}{\cyrshch}{\cyre}{\cyrn}{\cyrn}{\cyra}{\cyrya} {\cyrf}{\cyro}{\cyrr}{\cyrm}{\cyru}{\cyrl}{\cyra} {\cyrk}{\cyro}{\cyrn}{\cyre}{\cyrch}{\cyrn}{\cyro}{\cyrg}{\cyro} {\cyrp}{\cyrr}{\cyri}{\cyrr}{\cyra}{\cyrshch}{\cyre}{\cyrn}{\cyri}{\cyrya} {\cyrd}{\cyrl}{\cyrya} {\cyrf}{\cyru}{\cyrn}{\cyrk}{\cyrc}{\cyri}{\cyri} {\cyrm}{\cyrn}{\cyro}{\cyrg}{\cyri}{\cyrh} {\cyrp}{\cyre}{\cyrr}{\cyre}{\cyrm}{\cyre}{\cyrn}{\cyrn}{\cyrery}{\cyrh}},
     journal = {Matematicheskoe Prosveshchenie},
     pages = {55--57},
     year = {1936},
     volume = {Ser. 1, 5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MP_1936_1_5_a7/}
}