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2. B. C. Kuo, Automatic Control Systems, Prentic-Hall, Inc., 1982.
3. C. T. Chen, Linear System Theory and Design, Holt Rinehart, and Winston, 1970.
4. M. D. Greenberg, Foundations of Applied Mathematics, Wellesley-Cambridge Press, 1986.
5. G. Strang, Introduction to Applied Mathematics, Prentice-Hall, 1978.