@article{DE_1973_9_11_a21,
     author = {V. M. Marchenko},
     title = {The algebraic basis for a certain controllability criterion},
     journal = {Differencialʹnye uravneni\^a},
     pages = {2088--2091},
     publisher = {mathdoc},
     volume = {9},
     number = {11},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1973_9_11_a21/}
}