@article{KYB_1973_9_6_a3,
     author = {Soukup, V\'aclav},
     title = {Weighting function and state equations of linear discrete-time-varying system},
     journal = {Kybernetika},
     pages = {467--474},
     year = {1973},
     volume = {9},
     number = {6},
     mrnumber = {0337403},
     zbl = {0287.93012},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KYB_1973_9_6_a3/}
}