@article{KYB_1983_19_3_a3,
     author = {Z\"ornig, Pavel},
     title = {On difference equations and discrete systems},
     journal = {Kybernetika},
     pages = {225--236},
     year = {1983},
     volume = {19},
     number = {3},
     mrnumber = {716651},
     zbl = {0519.93050},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KYB_1983_19_3_a3/}
}