1. Sagdeev, R.Z., Voprosy teorii plazmy (Plasma Theory Problems), Leontovich, M.A., Ed., Moscow: Atomizdat, 1964.
2. Dubinov, A.E. and Sazonkin, M.A., Handbook of Solitons: Research, Technology and Applications, Lang, S.P. and Bedore, S.H., Eds., New York: Nova Science, 2009.
3. Tran, M.Q., Phys. Scripta, 1979, vol. 20, no. 3.
4. Chang, H.Y., Lien, C., Seyhoonzadeh, A., Forsling, P., and Lonngren, K.E., IEEE Trans. Plasma Sci., 1988, vol. 16, no. 1, p. 50.
5. Chang, H.Y., Raychaudhuri, S., Hill, J., Tsikis, E.K., and Lonngren, K.E., Phys. Fluids, 1986, vol. 29, no. 1, p. 294.