@article{DE_1991_27_9_a1,
     author = {R. G. Aliev},
     title = {Normal solvability of a functional-differential equation with operator coefficients in a {Hilbert} space},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1486--1493},
     year = {1991},
     volume = {27},
     number = {9},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1991_27_9_a1/}
}