Research conducted at international institutions

• Université Paul Sabatier. Laboratory of Quantum Physics.
  Toulouse (France), November-December 1996 and October-December 1997.

• Ecole Polytechnique Fédérale de Lausanne.
  Lausanne (Switzerland), July 1996.

• University of California, Berkeley.
  Berkeley, California (USA), August 1996.

• Universiteit van Amsterdam.
  (Under the auspices of a Nuffic fellowship)
  Amsterdam (Holland), May-June 1996.

• University of California, Berkeley.
  (Under the auspices of Fulbright & International Institute Fellowship).
  Berkeley, California (USA), 1994.

• Western Ontario University.
  London, Ontario (Canada), June 1994.