@article{DE_1984_20_6_a4,
     author = {M. Kh. Lantsman},
     title = {Asymptotic representations of solutions of a class of linear differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {958--967},
     year = {1984},
     volume = {20},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1984_20_6_a4/}
}