@article{DAN_1993_328_5_a7,
     author = {I. V. Andrianov},
     title = {A new asymptotic method for the integration of equations of},
     journal = {Doklady Akademii Nauk},
     pages = {557--558},
     publisher = {mathdoc},
     volume = {328},
     number = {5},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1993_328_5_a7/}
}