@article{MP_1957_2_1_a35,
     author = {A. 3. Ryvkin},
     title = {{\CYRK}{\cyrn}{\cyri}{\cyrg}{\cyri} {\cyrp}{\cyro} {\cyrm}{\cyra}{\cyrt}{\cyre}{\cyrm}{\cyra}{\cyrt}{\cyri}{\cyrk}{\cyre}, {\cyrv}{\cyrery}{\cyrh}{\cyro}{\cyrd}{\cyrya}{\cyrshch}{\cyri}{\cyre} {\cyrv}~1957~{\cyrg}.},
     journal = {Matematicheskoe Prosveshchenie},
     pages = {269--286},
     year = {1957},
     volume = {Ser. 2, 1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MP_1957_2_1_a35/}
}