@article{DAN_1957_116_1_a26, author = {Yu. S. Bogdanov}, title = {{\CYRP}{\cyro}{\cyrp}{\cyrr}{\cyra}{\cyrv}{\cyrk}{\cyri} {\cyrk}~{\cyrs}{\cyrt}{\cyra}{\cyrt}{\cyrsftsn}{\cyre} {{\textquotedblleft}{\CYRN}{\cyro}{\cyrr}{\cyrm}{\cyrery}} {{\CYRL}{\cyrya}{\cyrp}{\cyru}{\cyrn}{\cyro}{\cyrv}{\cyra}} {\cyrv}~{\cyrl}{\cyri}{\cyrn}{\cyre}{\cyrishrt}{\cyrn}{\cyrery}{\cyrh} {\cyrp}{\cyrr}{\cyro}{\cyrs}{\cyrt}{\cyrr}{\cyra}{\cyrn}{\cyrs}{\cyrt}{\cyrv}{\cyra}{\cyrh}{\textquotedblright}}, journal = {Doklady Akademii Nauk}, pages = {8}, year = {1957}, volume = {116}, number = {1}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1957_116_1_a26/} }