@article{MP_1961_a5,
     author = {V. G. Boltyanskii and V. A. Efremovich},
     title = {{\CYRO}{\cyrch}{\cyre}{\cyrr}{\cyrk} {\cyro}{\cyrs}{\cyrn}{\cyro}{\cyrv}{\cyrn}{\cyrery}{\cyrh} {\cyri}{\cyrd}{\cyre}{\cyrishrt} {\cyrt}{\cyro}{\cyrp}{\cyro}{\cyrl}{\cyro}{\cyrg}{\cyri}{\cyri}. {({\CYRO}{\cyrk}{\cyro}{\cyrn}{\cyrch}{\cyra}{\cyrn}{\cyri}{\cyre})}},
     journal = {Matematicheskoe Prosveshchenie},
     pages = {107--138},
     publisher = {mathdoc},
     year = {1961},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MP_1961_a5/}
}