@article{SM_1978_34_2_a1,
     author = {Yu. M. Semenov},
     title = {On the controllability of linear systems with constant coefficients},
     journal = {Sbornik. Mathematics},
     pages = {147--160},
     publisher = {mathdoc},
     volume = {34},
     number = {2},
     year = {1978},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1978_34_2_a1/}
}