@article{DE_1968_4_3_a17,
     author = {Kh. Yu. Kurdanov},
     title = {A new proof of the instability of the characteristic exponents of a certain regular system},
     journal = {Differencialʹnye uravneni\^a},
     pages = {551--552},
     publisher = {mathdoc},
     volume = {4},
     number = {3},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1968_4_3_a17/}
}