@article{DAN_1967_177_5_a18,
     author = {L. A. Pokrovskii},
     title = {{\CYRN}{\cyre}{\cyro}{\cyrb}{\cyrr}{\cyra}{\cyrt}{\cyri}{\cyrm}{\cyrery}{\cyre} {\cyrp}{\cyrr}{\cyro}{\cyrc}{\cyre}{\cyrs}{\cyrs}{\cyrery} {\cyrv}~{\cyrs}{\cyri}{\cyrs}{\cyrt}{\cyre}{\cyrm}{\cyre} {\cyrs}~{\cyrv}{\cyrn}{\cyru}{\cyrt}{\cyrr}{\cyre}{\cyrn}{\cyrn}{\cyri}{\cyrm}{\cyri} {\cyrv}{\cyrr}{\cyra}{\cyrshch}{\cyre}{\cyrn}{\cyri}{\cyrya}{\cyrm}{\cyri}},
     journal = {Doklady Akademii Nauk},
     pages = {1054--1057},
     publisher = {mathdoc},
     volume = {177},
     number = {5},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1967_177_5_a18/}
}