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2. Elementary Topology;Gemignani,1967
3. Direct construction of minimal bilinear realizations from nonlinear input-output maps;Isidori;IEEE Trans. Automat. Control,1973
4. Finite State Models for Logical Machines;Hennie,1968
5. Dynamic systems: An automata-motivated analytic approach;Kaliski;MIT, Electronics Systems Laboratory Report No. ESL-R-453,1971