1. Bethe, H. A., 1972, unpublished, Los Alamos Scientific Laboratory Informal Report No. LA 5031-MS.
2. Bezzerides, B. and D. F. Dubois, 1976, Phys. Rev. Lett. 36, 729.
3. Billman, K. W., P. D. Roweley, J. R. Stallcop and L. Presly, 1974, Phys. Fluids 17, 759.
4. Boyer, K., 1973, Astronaut. Aeronaut. 11, 28.
5. Brueckner, K. A. and S. Jorna, 1974, Rev. Mod. Phys. 4–6, 325.