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 Congress of Mathematics Warshava, POLAND (1983).

 
 International Conferences on Spaces of Differentiable Functions, Alma-Ata (1976), Moscow (1972-1988, 1998).� 
 International Math. Congress Warshava, POLAND (1984).

 
 International Conferences on Sobolev Spaces, Baku (1980), Praha (1979), Yerevan (1981), St-Petersburg (1975, 1978, 1981), Kiev (1978,1988), Paris (1991), Sofia (1997), Dnepropetrovsk (1973,1983)