@article{DE_2001_37_6_a4,
     author = {Z. N. Primicheva and R. A. Prokhorova},
     title = {Coppel--Conti {Sets} of {Linear} {Unstable} {Systems}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {752--760},
     publisher = {mathdoc},
     volume = {37},
     number = {6},
     year = {2001},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2001_37_6_a4/}
}