@article{DE_1975_11_4_a6,
     author = {K. A. Dib},
     title = {Connectedness of certain sets of linear systems with integral separation},
     journal = {Differencialʹnye uravneni\^a},
     pages = {659--664},
     publisher = {mathdoc},
     volume = {11},
     number = {4},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1975_11_4_a6/}
}