@article{MP_1957_a3,
     author = {A. A. Lyapunov and G. A. Shestopal},
     title = {{\CYRO}{\cyrb} {\cyra}{\cyrl}{\cyrg}{\cyro}{\cyrr}{\cyri}{\cyrt}{\cyrm}{\cyri}{\cyrch}{\cyre}{\cyrs}{\cyrk}{\cyro}{\cyrm} {\cyro}{\cyrp}{\cyri}{\cyrs}{\cyra}{\cyrn}{\cyri}{\cyri} {\cyrp}{\cyrr}{\cyro}{\cyrc}{\cyre}{\cyrs}{\cyrs}{\cyro}{\cyrv} {\cyru}{\cyrp}{\cyrr}{\cyra}{\cyrv}{\cyrl}{\cyre}{\cyrn}{\cyri}{\cyri}},
     journal = {Matematicheskoe Prosveshchenie},
     pages = {81--95},
     publisher = {mathdoc},
     year = {1957},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MP_1957_a3/}
}