@article{CMH_1985__60_140036,
     author = {Uwe Helmke},
     title = {The topology of a moduli space for linear dynamical systems.},
     journal = {Commentarii mathematici Helvetici},
     pages = {630--655},
     publisher = {mathdoc},
     volume = {60},
     year = {1985},
     zbl = {0613.93008},
     url = {http://geodesic.mathdoc.fr/item/CMH_1985__60_140036/}
}