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3. [G. I. Dimov, V. V. Zakaidakov, and M. E. Kishinevsky, Sov. J. Plasma Phys. 2, 326 (1976)]; SJPPDC0360-0343
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5. See the review article by T. K. Fowler, in Fusion, edited by E. Teller (Academic, New York, 1981), pp. 310–319, and references therein.