Kotta, Yulle Determination of the state-space model of 2-D system from its input- output representation. (English) Zbl 0572.93014 Izv. Akad. Nauk Ehst. SSR, Fiz., Mat. 34, 26-31 (1985). Reviewer: T.Kaczorek MSC: 93B15 93B20 70G10 93B40 93B10 93C05 93C35 93C55 PDFBibTeX XMLCite \textit{Y. Kotta}, Izv. Akad. Nauk Èst. SSR, Fiz., Mat. 34, 26--31 (1985; Zbl 0572.93014)
Nurges, Yu. A model for the state of a discrete system in an orthogonal base. (Russian) Zbl 0511.93049 Izv. Akad. Nauk Ehst. SSR, Fiz., Mat. 31, 382-389 (1982). MSC: 93C57 42C15 93C05 70G10 93C35 93B15 PDFBibTeX XMLCite \textit{Yu. Nurges}, Izv. Akad. Nauk Èst. SSR, Fiz., Mat. 31, 382--389 (1982; Zbl 0511.93049)
Kotta, Yulle Equivalent input-output description for Bucy canonical state-space representation. (English) Zbl 0476.93020 Izv. Akad. Nauk Ehst. SSR, Fiz., Mat. 30, 388-391 (1981). MSC: 93B10 93C05 93C55 93C35 93C99 70G10 PDFBibTeX XMLCite \textit{Y. Kotta}, Izv. Akad. Nauk Èst. SSR, Fiz., Mat. 30, 388--391 (1981; Zbl 0476.93020)
Keis, I. On a new type of an invariant of dynamic systems. (Russian) Zbl 0321.70008 Izv. Akad. Nauk Ehst. SSR, Fiz. Mat. 24, 277-284 (1975). MSC: 70G10 70F20 70H99 70F25 PDFBibTeX XMLCite \textit{I. Keis}, Izv. Akad. Nauk Èst. SSR, Fiz., Mat. 24, 277--284 (1975; Zbl 0321.70008)