@article{DE_1974_10_6_a15,
     author = {Kh. Eshmatov},
     title = {Averaging in certain systems of integro-differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1124--1129},
     year = {1974},
     volume = {10},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1974_10_6_a15/}
}