@article{DE_1978_14_4_a4,
     author = {A. V. Metel'skii and S. A. Minyukov},
     title = {On the theory of the complete observability of systems with lag},
     journal = {Differencialʹnye uravneni\^a},
     pages = {624--633},
     publisher = {mathdoc},
     volume = {14},
     number = {4},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1978_14_4_a4/}
}