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3. K. Brammer and G. Siffling, Kalman-Bucy Filter (Olden- bourg, München 1975; Nauka, Moscow, 1982).
4. R. A. Singer, IEEE Trans. Aerosp. Electron. Syst. 6, 473 (1970).
5. L. Zadeh, The Concept of Linguistic Variable and Its Application to Approximate Reasoning (Elsevier, New York, 1973; Mir, Moscow, 1976).