@article{DE_1970_6_6_a19,
     author = {G. S. Larionov},
     title = {Three variants of averaging in integro-differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1125--1126},
     publisher = {mathdoc},
     volume = {6},
     number = {6},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1970_6_6_a19/}
}