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@article{DE_1982_18_6_a10, author = {L. V. Zilbergleit}, title = {Asymptotic solutions of differential equations with analytic coefficients}, journal = {Differencialʹnye uravneni\^a}, pages = {1014--1019}, publisher = {mathdoc}, volume = {18}, number = {6}, year = {1982}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1982_18_6_a10/} }
L. V. Zilbergleit. Asymptotic solutions of differential equations with analytic coefficients. Differencialʹnye uravneniâ, Tome 18 (1982) no. 6, pp. 1014-1019. http://geodesic.mathdoc.fr/item/DE_1982_18_6_a10/