1. Bellman, R., Kalaba, R. and Lockett, J., (1966),Numerical Inversion of the Laplace Transform. Amer. Elsevier, New York.
2. Carson, J. R., (1926),Wave propagation in overhead wires with ground wires. Bell Syst. Techn. J., 5, 539–554.
3. Cooley, J., Lewis, P. and Welch, P., (1967),Application of the Fast Fourier Transform to computation of Fourier integrals, Fourier series, and convolution integrals. IEEE Trans., AU-15, 79–84.
4. Cooley, J., Lewis, P. and Welch, P., (1969,The Fast Fourier Transform and its application. IEEE Trans., E-12, 27–34.
5. Courant, R. and Hilbert, D., (1931),Methoden der Mathematischen Physik, vol. 1. J. Springer, Berlin, p. 64.