Connections with other scientific institutions
- July 1997 - Visiting Scientist, Cluster Science Group, Agency for Industrial Science and Technology, Japan.
- May - August 1999 - Visiting Scientist, Canadian Institute for Theoretical Astrophysics, University of Toronto.
- October 1999 - April 2000 - Visiting Scientist, Cluster Science Group, Agency for Industrial Science and Technology, Japan.
- July 2000 - Visiting Scientist, Institute of Chemistry and Biochemistry - Physical and Theoretical Chemistry (IPTC), Free University of Berlin.
- January 2001 - August 2001 - Visiting Scientist, The Fields Institute for Mathematical Science, University of Toronto.
- January 2002 - August 2002 - Visiting Scientist, The Fields Institute for Mathematical Science, University of Toronto.
- September 2006 - Visiting Scientist, The Fields Institute for Mathematical Science, University of Toronto.
- October 2006 - Visiting Scientist, International Centre for Theoretical Physics (ICTP), Trieste.
- December 2006 - August 2007 - Visiting Scientist, Centre of Theoretical Chemistry and Physics (CTCP), New Zealand.
