@article{KYB_1994__30_4_a1,
     author = {Gl\"using-L\"uerssen, Heide and Hinrichsen, Diederich},
     title = {The degeneration of reachable singular systems under feedback-transformations},
     journal = {Kybernetika},
     pages = {387--391},
     publisher = {mathdoc},
     volume = {30},
     number = {4},
     year = {1994},
     mrnumber = {1303290},
     zbl = {0819.93033},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KYB_1994__30_4_a1/}
}