@article{DE_1975_11_2_a0,
     author = {R. R. Akhmerov},
     title = {The averaging principle and almost periodic solutions of systems of functional-differential equations of neutral type},
     journal = {Differencialʹnye uravneni\^a},
     pages = {211--221},
     publisher = {mathdoc},
     volume = {11},
     number = {2},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1975_11_2_a0/}
}