- Computer Science Laboratory,
SRI International, Menlo Park, California,
USA, Observer, May-June 2017, and International Fellow,
September 2015 - September 2016 (sabbatical year).
- The University of Manchester, Manchester, England, UK, March-April 2017.
- Universität Koblenz-Landau, Koblenz, Germany, September 2014 and June 1999.
- Max-Planck-Institut für Informatik, Germany, June 2014.
- Microsoft Research,
Redmond, Washington, USA, Gratis Visitor, June 2013, and Visiting Research Scholar,
May - June 2008.
- University of Illinois at Urbana-Champaign,
Urbana-Champaign, Illinois, USA, June 2013.
- University of New Mexico,
Albuquerque, New Mexico, USA, June 2013.
- King's College,
London, England, UK, July 2012.
- Institute of Software,
Chinese Academy of Sciences,
Beijing, PR China, June 2011.
- Tsinghua University, Beijing, PR China, May 2007.
- Università degli Studi di Genova, Genova, Italy, June - July 2001.
- Università degli Studi di Roma "La Sapienza",
Roma, Italy, May - June 2000.
- Technische Universität Dresden, Guest Professor,
Dresden, Germany, May - June 1999.
- Argonne National Laboratory, Argonne, Illinois, USA,
June 1998 and January - February 1993.
- Artificial Intelligence Center,
SRI International, Menlo Park, California, USA, October 1996.
- National Taiwan University,
Taipei, Taiwan ROC, March 1989.
- Université Paris XI,
Orsay, France, September - December 1988.
Maria Paola Bonacina