@article{UZKU_1931_91_4_a12,
     author = {N. N. Parfent'ev},
     title = {{\CYRI}{\cyrz} {\cyrzh}{\cyri}{\cyrz}{\cyrn}{\cyre}{\cyrd}{\cyre}{\cyrya}{\cyrt}{\cyre}{\cyrl}{\cyrsftsn}{\cyrn}{\cyro}{\cyrs}{\cyrt}{\cyri} {\cyrk}{\cyra}{\cyrf}{\cyre}{\cyrd}{\cyrr} {\cyrm}{\cyra}{\cyrt}{\cyre}{\cyrm}{\cyra}{\cyrt}{\cyri}{\cyrk}{\cyri}, {\cyrm}{\cyre}{\cyrh}{\cyra}{\cyrn}{\cyri}{\cyrk}{\cyri} {\cyri} {\cyra}{\cyrerev}{\cyrr}{\cyro}{\cyrd}{\cyri}{\cyrn}{\cyra}{\cyrm}{\cyri}{\cyrk}{\cyri} {\cyrz}{\cyra} {\cyrp}{\cyro}{\cyrs}{\cyrl}{\cyre}{\cyrd}{\cyrn}{\cyri}{\cyre} {\cyrg}{\cyro}{\cyrd}{\cyrery}},
     journal = {U\v{c}\"enye zapiski Kazanskogo universiteta. Seri\^a Fiziko-matemati\v{c}eskie nauki},
     pages = {87--89},
     publisher = {mathdoc},
     volume = {91},
     number = {4},
     year = {1931},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/UZKU_1931_91_4_a12/}
}