@article{KYB_1993_29_6_a7,
     author = {Grasselli, Osvaldo Maria and Longhi, Sauro and Tornamb\`e, Antonio},
     title = {On the derivation of a state-space model of a periodic process described by recurrent equations},
     journal = {Kybernetika},
     pages = {617--627},
     year = {1993},
     volume = {29},
     number = {6},
     mrnumber = {1264891},
     zbl = {0801.93034},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KYB_1993_29_6_a7/}
}