@article{DE_1978_14_4_a13,
     author = {V. T. Borukhov},
     title = {Controllable {Volterra} integro-differential operators},
     journal = {Differencialʹnye uravneni\^a},
     pages = {699--705},
     publisher = {mathdoc},
     volume = {14},
     number = {4},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1978_14_4_a13/}
}