@article{DE_1972_8_9_a5,
     author = {S. A. Grishin},
     title = {Nonstability of the exponent of exponential separatedness of the solutions of a system of differential equations and nonsymmetry of the relation of almost reducibility of systems of differential equations with integral separatedness of the solutions},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1577--1586},
     publisher = {mathdoc},
     volume = {8},
     number = {9},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1972_8_9_a5/}
}