@article{MS_1950__69_1_a5,
     author = {{\CYRS}.{\CYRN}. {\CYRCH}{\cyre}{\cyrr}{\cyrn}{\cyri}{\cyrk}{\cyro}{\cyrv}},
     title = {{\CYRP}{\cyre}{\cyrr}{\cyri}{\cyro}{\cyrd}{\cyri}{\cyrch}{\cyre}{\cyrs}{\cyrk}{\cyri}{\cyre} $ZA$-{\cyrr}{\cyra}{\cyrs}{\cyrsh}{\cyri}{\cyrr}{\cyre}{\cyrn}{\cyri}{\cyrya} {\cyrp}{\cyro}{\cyrl}{\cyrn}{\cyrery}{\cyrh} {\cyrg}{\cyrr}{\cyru}{\cyrp}{\cyrp}},
     journal = {Matemati\v{c}eskij sbornik},
     pages = {117--128},
     publisher = {mathdoc},
     volume = {69},
     number = {1},
     year = {1950},
     zbl = {0039.25301},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MS_1950__69_1_a5/}
}