@article{DE_1970_6_6_a0,
     author = {B. F. Bylov},
     title = {The simultaneous stability of the characteristic exponents of mutually adjoint systems of linear differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {943--947},
     publisher = {mathdoc},
     volume = {6},
     number = {6},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1970_6_6_a0/}
}