1. T. T. Wu andH. Cweng:AIP Conference Proceedings (Stony Brook, N. Y., 1973).
2. G. F. Chew andJ. Kopuk:Phys. Lett.,48 B, 211 (1974).
3. P. B. Burt:International Symposium on Mathematical Physics (proceedings to be published), University of Texas, Austin, Nov. 18–22, 1974;Phys. Rev. Lett.,32, 1080 (1974);J. Phys. A,7, 356 (1974);P. B. Burt andJ. L. Reid:J. Phys. A,6, 1388 (1973).
4. J. J. Stoker:Water Waves (New York, N. Y., 1957);R. Z. Sagdeev:Reviews of Plasma Physics, Vol.4 (New York, N. Y., 1969);G. L. Lamb:Rev. Mod. Phys.,43, 99 (1971);H. Washini andT. Taniuti:Phys. Rev. Lett.,17, 961 (1966);N. Hershkowitz andT. Romesser:Phys. Rev. Lett.,32, 581 (1974);K. Nakamura andT. Sasada:Phys. Lett.,48 A, 321 (1974).
5. Bateman Manuscript Project, Higher Transcendental Functions, Vol.2 (New York, N. Y., 1953).