@misc{MP_1957_a21,
     title = {{\CYRA}{\cyrn}{\cyrk}{\cyre}{\cyrt}{\cyra} {\cyrzh}{\cyru}{\cyrr}{\cyrn}{\cyra}{\cyrl}{\cyra} {``Cahiers} pedagogiques'' {\cyrn}{\cyra} {\cyrt}{\cyre}{\cyrm}{\cyru} {``{\CYRS}{\cyro}{\cyrv}{\cyrr}{\cyre}{\cyrm}{\cyre}{\cyrn}{\cyrn}{\cyra}{\cyrya}} {\cyrm}{\cyra}{\cyrt}{\cyre}{\cyrm}{\cyra}{\cyrt}{\cyri}{\cyrk}{\cyra} {\cyri} {\cyre}{\cyre} {\cyrp}{\cyrr}{\cyre}{\cyrp}{\cyro}{\cyrd}{\cyra}{\cyrv}{\cyra}{\cyrn}{\cyri}{\cyre}'' {({\CYRP}{\cyre}{\cyrr}{\cyre}{\cyrv}{\cyro}{\cyrd}} {\cyrs}~{\cyrf}{\cyrr}{\cyra}{\cyrn}{\cyrc}{\cyru}{\cyrz}{\cyrs}{\cyrk}{\cyro}{\cyrg}{\cyro} {{\CYRYU}.\,{\CYRS}.~{\CYRR}{\cyro}{\cyrd}{\cyrm}{\cyra}{\cyrn}} {\cyrp}{\cyro}{\cyrd} {{\cyrr}{\cyre}{\cyrd}.~{\CYRA}.\,{\CYRI}.~{\CYRM}{\cyra}{\cyrr}{\cyrk}{\cyru}{\cyrsh}{\cyre}{\cyrv}{\cyri}{\cyrch}{\cyra})}},
     journal = {Matematicheskoe Prosveshchenie},
     pages = {253--260},
     publisher = {mathdoc},
     year = {1957},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MP_1957_a21/}
}