@article{ETNA_1996__4__a4,
     author = {Mehrmann,  Volker and Xu,  Hongguo},
     title = {An analysis of the pole placement problem {I:} {The} single-input case},
     journal = {Electronic transactions on numerical analysis},
     pages = {89--105},
     year = {1996},
     volume = {4},
     zbl = {0890.65036},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ETNA_1996__4__a4/}
}