@article{DE_1990_26_10_a2,
     author = {A. I. Bulgakov},
     title = {Averaging functional-differential inclusions},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1678--1690},
     publisher = {mathdoc},
     volume = {26},
     number = {10},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1990_26_10_a2/}
}