@article{KYB_2002_38_5_a8,
     author = {Pommaret, Jean-Fran\c{c}ois},
     title = {Poles and zeroes of nonlinear control systems},
     journal = {Kybernetika},
     pages = {609--615},
     year = {2002},
     volume = {38},
     number = {5},
     mrnumber = {1966949},
     zbl = {1265.93117},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KYB_2002_38_5_a8/}
}