@article{DE_1993_29_6_a6,
     author = {A. V. Metel'skii},
     title = {A criterion for the output controllability of linear autonomous functional-differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {961--969},
     year = {1993},
     volume = {29},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1993_29_6_a6/}
}