@article{UZKU_1931_91_4_a0,
     author = {N. G. Chetaev},
     title = {{\CYRO}{\cyrb} {\cyru}{\cyrs}{\cyrt}{\cyro}{\cyrishrt}{\cyrch}{\cyri}{\cyrv}{\cyrery}{\cyrh} {\cyrt}{\cyrr}{\cyra}{\cyre}{\cyrk}{\cyrt}{\cyro}{\cyrr}{\cyri}{\cyrya}{\cyrh} {\cyrd}{\cyri}{\cyrn}{\cyra}{\cyrm}{\cyri}{\cyrk}{\cyri}},
     journal = {U\v{c}\"enye zapiski Kazanskogo universiteta. Seri\^a Fiziko-matemati\v{c}eskie nauki},
     pages = {3--8},
     publisher = {mathdoc},
     volume = {91},
     number = {4},
     year = {1931},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/UZKU_1931_91_4_a0/}
}