@article{MP_1935_1_3_a4,
     author = {P. I. Sapunov},
     title = {{\CYRP}{\cyrr}{\cyre}{\cyro}{\cyrb}{\cyrr}{\cyra}{\cyrz}{\cyro}{\cyrv}{\cyra}{\cyrn}{\cyri}{\cyre} {\cyri} {\cyro}{\cyrb}{\cyrhrdsn}{\cyre}{\cyrd}{\cyri}{\cyrn}{\cyre}{\cyrn}{\cyri}{\cyre} {\cyrg}{\cyrr}{\cyru}{\cyrp}{\cyrp} {\cyro}{\cyrb}{\cyrshch}{\cyri}{\cyrh} {\cyrr}{\cyre}{\cyrsh}{\cyre}{\cyrn}{\cyri}{\cyrishrt} {\cyrt}{\cyrr}{\cyri}{\cyrg}{\cyro}{\cyrn}{\cyro}{\cyrm}{\cyre}{\cyrt}{\cyrr}{\cyri}{\cyrch}{\cyre}{\cyrs}{\cyrk}{\cyri}{\cyrh} {\cyru}{\cyrr}{\cyra}{\cyrv}{\cyrn}{\cyre}{\cyrn}{\cyri}{\cyrishrt}},
     journal = {Matematicheskoe Prosveshchenie},
     pages = {24--31},
     year = {1935},
     volume = {Ser. 1, 3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MP_1935_1_3_a4/}
}