@article{01209071,
title = {On the characteristic polynomial of matrices with prescribed columns and the stabilization and observability of linear systems.},
journal = {ELA. The Electronic Journal of Linear Algebra [electronic only]},
volume = {4},
year = {1998},
pages = {19-31},
zbl = {0926.15008},
language = {en},
url = {http://dml.mathdoc.fr/item/01209071}
}
Furtado, Susana; Silva, Fernando C. On the characteristic polynomial of matrices with prescribed columns and the stabilization and observability of linear systems.. ELA. The Electronic Journal of Linear Algebra [electronic only], Tome 4 (1998) pp. 19-31. http://gdmltest.u-ga.fr/item/01209071/