@article{DE_2003_39_12_a5,
     author = {S. N. Popova},
     title = {Global {Controllability} of the {Complete} {Set} of {Lyapunov} {Invariants} of {Periodic} {Systems}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1627--1636},
     publisher = {mathdoc},
     volume = {39},
     number = {12},
     year = {2003},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2003_39_12_a5/}
}