@article{UZKU_1931_91_4_a6,
     author = {K. P. Persidskii},
     title = {{\CYRN}{\cyre}{\cyrs}{\cyrk}{\cyro}{\cyrl}{\cyrsftsn}{\cyrk}{\cyro} {\cyrz}{\cyra}{\cyrm}{\cyre}{\cyrch}{\cyra}{\cyrn}{\cyri}{\cyrishrt} {\cyro} {\textquotedblleft}{\cyrz}{\cyra}{\cyrk}{\cyro}{\cyrn}{\cyre} {\cyrb}{\cyro}{\cyrl}{\cyrsftsn}{\cyrsh}{\cyri}{\cyrh} {\cyrch}{\cyri}{\cyrs}{\cyre}{\cyrl}{\textquotedblright}},
     journal = {U\v{c}\"enye zapiski Kazanskogo universiteta. Seri\^a Fiziko-matemati\v{c}eskie nauki},
     pages = {49--54},
     publisher = {mathdoc},
     volume = {91},
     number = {4},
     year = {1931},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/UZKU_1931_91_4_a6/}
}