@article{DE_1990_26_4_a10,
     author = {\`E. M. Fridman},
     title = {Asymptotics of integral manifolds and the decomposition of singularly perturbed systems of neutral type},
     journal = {Differencialʹnye uravneni\^a},
     pages = {626--639},
     publisher = {mathdoc},
     volume = {26},
     number = {4},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1990_26_4_a10/}
}