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2. 2Siljak, D. D., Nonlinear Systems: The Parameter Analysis and Design, Wiley, 1969, pp.1-59and pp. 398-401.
3. Parameter-Plane Analysis for Large-Scale Systems
4. High order system analysis and design using the root locus method
5. 5Kuo, B. C., Automatic Control Systems, Prentice-Hall, Englewood Cliffs, NJ, 1975, pp.473-479.