Amsterdam String Theory Workshop 2005, June 15th-22nd, 2005 (local participant)
Opening Colloquium of the Center of Mathematical Physics Hamburg, October 20th-22nd, 2005
XVIII Workshop Beyond the Standard Model, Bad Honnef, March 13th-16th, 2006
Noncommutative Geometry and Physics: Fundamental Structure of Space and
Time, Isaac Newton Institute, Cambridge, UK, September 4th-9th, 2006
19th Workshop "Foundations and Constructive Aspects of QFT",
Institut f"ur theoretische Physik, Göttingen, January 19th-20th,
2007, (my talk)
XIX Workshop Beyond the Standard Model, Bad Honnef, March
12th-15th, 2007 (my talk)
Quantum Structures, Leipzig, June 28th, 2007
20th Workshop "Foundations and Constructive Aspects of QFT",
Institut für theoretische Physik, Leipzig, June 29th-30th,
2007
21st Workshop "Foundations and Constructive Aspects of QFT",
Institut für theoretische Physik, Göttingen, January 25th-26th,
2008
22nd Workshop "Foundations and Constructive Aspects of QFT",
II. Institute for Theoretical Physics / Centre for Mathematical Physics, Hamburg, June 6th-7th,
2008
Promovierendentreffen des Ev. Studienwerks e.V. Villigst "Wieviel
Freiheit kostet unsere Sicherheit",
Haus Villigst, Schwerte, June 26th-29th,
2008
23rd Workshop "Foundations and Constructive Aspects of QFT",
Institut für theoretische Physik, Göttingen, January 30th-31st,
2009
25th Workshop "Foundations and Constructive Aspects of QFT",
Institut für theoretische Physik, Göttingen, January 15th-16th,
2010
26th Workshop "Foundations and Constructive Aspects of QFT",
Mathematisches Institut, Münster, June 18th-19th,
2010, (my talk)