Stays at universities abroad

2013 Dortmund University of Technology, Dortmund, Germany, three months

2012 Dortmund University of Technology, Dortmund, Germany, four months

2011 Dortmund University of Technology, Dortmund, Germany, one month

2007-2010 University of Dortmund, Dortmund, Germany, 27 months

2006 University of Dortmund, Dortmund, Germany, one week

2005 College of William and Mary, Williamsburg, USA, two months

2002 University of Dortmund, Dortmund, Germany, one week

1998 University Paris-Sud in Orsay, Paris, France, one week

1995 University Paris-Sud in Orsay, Paris, France, one month

1995-1996 Catholic University in Leuven, Leuven, Belgium, ten months