@article{DE_1992_28_5_a4,
     author = {K. I. Chernyshov},
     title = {Asymptotic expansions of a solution of the {Cauchy} problem for a linear differential equation},
     journal = {Differencialʹnye uravneni\^a},
     pages = {765--779},
     publisher = {mathdoc},
     volume = {28},
     number = {5},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1992_28_5_a4/}
}