@article{DE_1976_12_6_a8,
     author = {V. I. Fodchuk and A. Kholmatov},
     title = {Periodic and almost periodic solutions of singularly perturbed differential equations of neutral type},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1019--1027},
     publisher = {mathdoc},
     volume = {12},
     number = {6},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1976_12_6_a8/}
}