@misc{UZKU_1931_91_4_a13,
     title = {{\CYRS}{\cyrp}{\cyre}{\cyrc}{\cyri}{\cyra}{\cyrl}{\cyrsftsn}{\cyrn}{\cyrery}{\cyre} {\cyrp}{\cyrr}{\cyre}{\cyrd}{\cyrm}{\cyre}{\cyrt}{\cyrery} {\cyrv}~{\cyru}{\cyrch}{\cyre}{\cyrb}{\cyrn}{\cyro}{\cyrm} {\cyrp}{\cyrl}{\cyra}{\cyrn}{\cyre} {{\CYRM}{\cyra}{\cyrt}{\cyre}{\cyrm}{\cyra}{\cyrt}{\cyri}{\cyrk}{\cyro}-{\cyrm}{\cyre}{\cyrh}{\cyra}{\cyrn}{\cyri}{\cyrch}{\cyre}{\cyrs}{\cyrk}{\cyro}{\cyrg}{\cyro}} {\cyro}{\cyrt}{\cyrd}{\cyre}{\cyrl}{\cyre}{\cyrn}{\cyri}{\cyrya}},
     journal = {U\v{c}\"enye zapiski Kazanskogo universiteta. Seri\^a Fiziko-matemati\v{c}eskie nauki},
     pages = {89--91},
     publisher = {mathdoc},
     volume = {91},
     number = {4},
     year = {1931},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/UZKU_1931_91_4_a13/}
}