@article{DE_1969_5_10_a3,
     author = {B. F. Bylov and N. A. Izobov},
     title = {Necessary and sufficient conditions for the stability of the characteristic exponents of a diagonal system},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1785--1793},
     publisher = {mathdoc},
     volume = {5},
     number = {10},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1969_5_10_a3/}
}