@article{DE_1978_14_5_a0,
     author = {N. V. Azbelev and L. F. Rakhmatullina},
     title = {Functional-differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {771--797},
     publisher = {mathdoc},
     volume = {14},
     number = {5},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1978_14_5_a0/}
}