@article{DAN_1993_328_3_a3,
     author = {I. V. Kremleva},
     title = {A method for constructing asymptotic solutions of differential},
     journal = {Doklady Akademii Nauk},
     pages = {289--291},
     publisher = {mathdoc},
     volume = {328},
     number = {3},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1993_328_3_a3/}
}