@article{DE_1993_29_11_a4,
     author = {L. V. Kogan and N. Ya. Kogan and Yu. I. Neimark},
     title = {The method of auxiliary mappings and doubly asymptotic solutions of differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1900--1908},
     publisher = {mathdoc},
     volume = {29},
     number = {11},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1993_29_11_a4/}
}