2001 IMACS Conference on Applications of Computer Algebra, Technical Vocational Institute, Albuquerque, New Mexico, USA. 31 May -- 3 June 2001.

8th International Conference on Applications of Computer Algebra. Volos, Greece; 25--28 June 2002.

6th IMACS Conference on Applications of Computer Algebra. St. Petersburg, Russia; 25--28 June 2000.

COmputational COmmutative Algebra and International School on Computer Algebra. Corte Rosada Hotel Porto Conte, Italy; 23--26 May 2005.

MSRI, Berkeley, CA, USA; 13--15 March 2003.

5-day minicourse by Prof. John J. Cannon (University of Sydney, Australia) on "New Approaches to Computing Finite Group Invariants". Universite Libre de Bruxelles, Belgium; 15--19 April 2002.

Research Centre for Computer Algebra, University of Western Ontario in London, Ontario, Canada; 13 May 2000.

Florida State University, Tallahassee, Florida, USA; 5 May 2001.

Okanagan University College, Kelowna, BC, Canada; 15 November 1997.

First IMACS Conference on Applications of Computer Algebra. University of New Mexico, Albuquerque, New Mexico, USA; 16--19 May 1995.