1. See, for example, H. Ikezi, inSoliton in Action, edited by K. E. Lonngren and A. Scott (Academic, New York, 1978), p. 153;
2. Experiments on Ion-Acoustic Solitons in Plasmas Invited Review Article
3. Soliton experiments in plasmas
4. See, for example,Laser Interaction and Related Plasma Phenomena, edited by H. J. Schwarz and H. Hora (Plenum, New York, 1976 and 1977), Vols. 4A and 4B.