@article{DE_2005_41_2_a8,
     author = {E. K. Makarov and I. V. Marchenko and N. V. Semerikova},
     title = {On an {Upper} {Bound} for the {Higher} {Exponent} of a {Linear} {Differential} {System} with {Integrable} {Perturbations} on the {Half-Line}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {215--224},
     publisher = {mathdoc},
     volume = {41},
     number = {2},
     year = {2005},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2005_41_2_a8/}
}