1. J.W. Mather, Phys. Fluid 11(3), 611 (1968)
2. J.W. Mather, in Methods of experimental physics, vol. 9B, ed. by H. Griem, R. Lovberg (Academic Press, New York, 1971), p. 187
3. S. Lee et al., Am. J. Phys. 1, 56 (1988)
4. M. Zakaullah et al., J. Fusion Energ. 19, 2 (2002)
5. A. Serban, S. Lee, Plasma Sources Sci. Technol. 6, 78 (1997)