@article{DE_1988_24_12_a3,
     author = {I. V. Gaishun and V. v. Goryachkin},
     title = {Conditions for the solvability and controllability of linear two-parameter discrete systems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {2047--2051},
     publisher = {mathdoc},
     volume = {24},
     number = {12},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1988_24_12_a3/}
}