@article{DE_1990_26_2_a0,
     author = {E. A. Barabanov},
     title = {Description of the behavior of higher sigma-exponents of a triangular system and of a system of its diagonal approximation},
     journal = {Differencialʹnye uravneni\^a},
     pages = {187--205},
     publisher = {mathdoc},
     volume = {26},
     number = {2},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1990_26_2_a0/}
}