• Conference on New Trends in Mathematics and Applications, June 1992, Quy Nhon, Vietnam

• International Conference on Fourier Analysis and Applications FAA 98, May 1998, Kuwait

• International Conference on Abstract and Applied Analysis ICAAA 2002, August 2002, Hanoi, Vietnam

• Workshop on Inverse Problems, February 2004, Carrollton, USA

• Workshop on Sampling, Spectral Theory and Their Applications, April 2005, Carrollton, USA

• International Conference on Abstract and Applied Analysis ICAAA 2005, June 2005, Quynhon, Vietnam

• Session on Integral Transforms and Applications at ISAAC Congress, July 2005, Catania, Italy

• International Conference on Analytic Methods of Analytic and Differential Equations, September 2006, Minsk, Belarus