@article{KYB_1991_27_3_a4,
     author = {Grasselli, Osvaldo Maria and Longhi, Sauro},
     title = {Input and output decoupling zeros of linear periodic discrete-time systems},
     journal = {Kybernetika},
     pages = {202--212},
     year = {1991},
     volume = {27},
     number = {3},
     mrnumber = {1116834},
     zbl = {0746.93059},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KYB_1991_27_3_a4/}
}