@article{DE_1985_21_9_a0,
     author = {A. I. Vahabov},
     title = {Asymptotic expansion of solutions of systems of ordinary differential equations with a parameter},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1475--1479},
     publisher = {mathdoc},
     volume = {21},
     number = {9},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1985_21_9_a0/}
}