Participation in Conferences
International Conf. On Complex Analysis and its Appl. To Partial Diff. Equations: IV (1984) and V (1988) Halle (DDR),
Chech-Sov Symposium on Appl. of Meth. of Func. Anal. in Math. Ph. VIII (1983) and X (1988) Czechoslovakia (Praha, Bratislava),
International Conference on Mathematic (1994), Tehran (Iran),
International Conf. on Partial Diff. Equations (1996) Potsdam, (2000) Berlin (Germany).