• Prof. Karl Kirchner, Vienna University of Technology, Austria (2008)

 

• ​Prof. Pierre Dixneuf, University of Rennes 1, France (2009)

 

• ​Prof. Christian Bruneau, University of Rennes 1, France (2009)

 

• Prof. Louis Farrugia, University of Glasgow, Scotland, UK (2012)

 

• Dr. David Semeril, University of Strasbourg, France (2014)

 

• Dr. Dominique Matt, Université de Strasbourg, France (2015)

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