@article{PORMA_1995__52_2_47308,
     author = {Cabral, Isabel and Silva, Fernando C.},
     title = {Controllability indices of partially prescribed pairs of matrices.},
     journal = {Portugaliae mathematica},
     pages = {175--192},
     publisher = {mathdoc},
     volume = {52},
     number = {2},
     year = {1995},
     zbl = {0827.93008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1995__52_2_47308/}
}