1. International Conf. Laser Produced Plasmas (Moscow 1970).
2. Berkner Symposium Ionosph. Irreg. (Dallas 1973)
3. Astrophysical Workshop (Berkeley 1973).
4. Yamanaka Seminar Laser Produced Plasmas (Japan 1974).
5. Nobel Symposium Nonlinear Processes (Gothenberg 1976).
6. Gordon Conference on Magnetic Reconnection (1977).
7. Chapman Conference Substrom Phenomena (Los Alamos 1977).
8. U.S.-U.S.S.R. Workshop on Anomalous Transport (Kiev 1978).
9. Kiev Conference on Nonlinear Processes etc. (Kiev 1979).
10. Divertor Workshop (Princeton 1980).
11. Advanced Tokamak Workshop (Princeton 1980).
12. APS Cond. Matter Division Symp. Plasma Turbulence (Phoenix 1981).
13. International Conf. on Plasma Physics, Lausanne, Switzerland (1984).
14. International Dawson Symposium, UCLA (1990).
15. IAEA Artsimovich Memorial Lecture (1992).
16. International Conf. for Plasma Physics, Innsbruck (1992).
17. International Conf. for Plasma Physics, Brazil (1994).
18. Invited Summary Speaker IAEA Conf. on Plasma Physics & Controlled Fusion, Seville, Spain (1994).
19. Invited Plenary Speaker in concluding session on ‘Future of Plasma Physics’, International Conf. for Plasma Physics, Nagoya, Japan (1996).
20. Invited Plenary Talk in the Centennial Celebration of the American Physical Society, at Atlanta, Georgia, USA, on “International Energy Research – Sources, Consumption and Alternatives” (March 1999).
21. ICPP / APS, Quebec City (2000).
22. ICPP, Kiev (2005).
23. Festival of Theory, Aix-in-Provence, France, 2001, 2003, 2005, 2007.
24. Frontiers of Nonlinear Plasma Theory, Nizhny Novogord, 2007.
25. ITER School, Aix-in-Provence, 2007.
26. World Conference of American Association for Advancement of Science Annual Meeting held at Boston, 2008.