@article{DAN_1987_293_5_a5,
     author = {V. V. Kucherenko and Yu. V. Osipov},
     title = {Asymptotic solutions of equations with a regular singular point},
     journal = {Doklady Akademii Nauk},
     pages = {1049--1053},
     publisher = {mathdoc},
     volume = {293},
     number = {5},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1987_293_5_a5/}
}