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@article{DAN_1975_225_3_a5, author = {A. Yu. Levin}, title = {Some questions on the asymptotics for ordinary linear differential equations}, journal = {Doklady Akademii Nauk}, pages = {503--506}, publisher = {mathdoc}, volume = {225}, number = {3}, year = {1975}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1975_225_3_a5/} }
A. Yu. Levin. Some questions on the asymptotics for ordinary linear differential equations. Doklady Akademii Nauk, Tome 225 (1975) no. 3, pp. 503-506. http://geodesic.mathdoc.fr/item/DAN_1975_225_3_a5/