@article{DE_1967_3_6_a5,
     author = {G. F. Yakovleva},
     title = {The existence of bounded and periodic solutions of integro-differential equations with retarded argument},
     journal = {Differencialʹnye uravneni\^a},
     pages = {919--925},
     publisher = {mathdoc},
     volume = {3},
     number = {6},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1967_3_6_a5/}
}