1. 1Volterra, V., Theory of Functionals and of Integral and Integro-Differential Equations, Dover, New York, 1959, pp.1-39.
2. 2Wiener, N., Selected Papers of Norbert Wiener Including Generalized Harmonic Analysis and Tauberian Theorems, Society for Industrial and Applied Mathematics and MIT Press, Cambridge, MA, 1964, pp.17-33.
3. 4Schetzen, M., The Volterra and Wiener Theories of Nonlinear Systems, Wiley-Interscience, New York, 1980, pp.1-122, 145-198.
4. 5Boyd, S. P. “Volterra Series, Engineering Fundamentals,” Ph.D. Dissertation, Dept. of Electrical Engineering and Computer Sciences,Univ. of California, Berkeley, CA,1985.