@article{MP_1935_a2,
     author = {A. V.},
     title = {{\CYRO}{\cyrb} {\cyru}{\cyrr}{\cyra}{\cyrv}{\cyrn}{\cyre}{\cyrn}{\cyri}{\cyri} $\displaystyle\sum_{x=1}^{x=n}N^3_x=0$},
     journal = {Matematicheskoe Prosveshchenie},
     pages = {11--12},
     publisher = {mathdoc},
     year = {1935},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MP_1935_a2/}
}