@article{DE_1992_28_9_a3,
     author = {A. G. Ivanov and E. L. Tonkov},
     title = {Uniform local controllability of a linear system},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1499--1507},
     publisher = {mathdoc},
     volume = {28},
     number = {9},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1992_28_9_a3/}
}