1. R. Abraham and J. E. Marsden, Foundations of Mechanics, Benjamin/Cummings, 1978.
2. V. I Arnold, Mathematical Methods of Classical Mechanics, Springer-Verlag, 1978.
3. L. A. Zadeh and C. A. Desoer, Linear System Theory—A State Space Approach, McGraw-Hill, 1963.
4. G. Zames, On the input-output stability of time-varying nonlinear feedback systems. Part I: Conditions derived using concepts of loop gain, conicity, and positivity, IEEE Transactions on Automatic Control, Vol. AC-11, pp. 228–38, 1966.
5. J. C. Willems, The Analysis of Feedback Systems, MIT Press, 1971.