@article{DE_1997_33_4_a8,
     author = {E. K. Makarov and S. N. Popova},
     title = {Local controllability of characteristic {Lyapunov} exponents of systems with simple exponents},
     journal = {Differencialʹnye uravneni\^a},
     pages = {495--499},
     publisher = {mathdoc},
     volume = {33},
     number = {4},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1997_33_4_a8/}
}