@article{DAN_1987_295_1_a6,
     author = {B. Yu. Sternin and V. E. Shatalov},
     title = {Asymptotic expansions of the solutions of differential equations},
     journal = {Doklady Akademii Nauk},
     pages = {38--41},
     publisher = {mathdoc},
     volume = {295},
     number = {1},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1987_295_1_a6/}
}