[1] L. Landau, “On the Vibrations of the Electronic Plasma,” Journal of Physics, Vol. 10, No. 1, 1946, pp. 25-34.
[2] Y. K. Lim and H. J. Lee, “Causality, Kramers-Kronig Relations, and Landau Damping,” The Open Plasma Physics Journal, Vol. 5, No. 1, 2012, pp. 36-40.
[3] N. G. Van Kampen and B. U. Felderhof, “Theoretical Methods in Plasma Physics,” John Wiley, New York, 1967.
[4] J. D. Jackson, “Classical Electrodynamics,” Wiley, New York, 1974.
[5] G. Arfken, “Mathematical Methods for Physicists,” Academic Press, Orlando, 1985, p. 415.
[6] D. Bohm and E. P. Gross, “Theory of Plasma Oscillations. A. Origin of Medium-Like Behavior,” Physical Review, Vol. 75, No. 12, 1949, pp. 1851-1864.