@article{MP_1935_1_3_a8,
     author = {L. A. Lyusternik},
     title = {{\CYRF}{\cyro}{\cyrr}{\cyrm}{\cyru}{\cyrl}{\cyra} {{\CYRS}{\cyrt}{\cyri}{\cyrr}{\cyrl}{\cyri}{\cyrn}{\cyrg}{\cyra}}},
     journal = {Matematicheskoe Prosveshchenie},
     pages = {48--51},
     year = {1935},
     volume = {Ser. 1, 3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MP_1935_1_3_a8/}
}