@article{MZM_2018_104_1_a13,
     author = {M. V. Kuznetsov},
     title = {A {Characteristic} of {Closed} {Nondegenerate} {Curves}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {154--157},
     publisher = {mathdoc},
     volume = {104},
     number = {1},
     year = {2018},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2018_104_1_a13/}
}