@article{DE_1992_28_8_a2,
     author = {O. I. Morozov},
     title = {Some sufficient conditions for the upper semistability of {Lyapunov} exponents of nonhomogeneous linear systems. {I}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1312--1317},
     publisher = {mathdoc},
     volume = {28},
     number = {8},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1992_28_8_a2/}
}