YESS-1 (2002): University of Klagenfurt (Austria)
YESS-2 (2004): University of Prague (Czech Republic)
YESS-3 (2006): University of Jyväskylä (Finland)
YESS-4 (2008): University of Trabzon (Turkey)
YESS-5 (2010): University of Palermo (Sicily, Italy)