Fuzzy Sets and Systems is a peer-reviewed international scientific journal published by Elsevier on behalf of the International Fuzzy Systems Association (IFSA) and was founded in 1978. The editors-in-chief (as of 2010) are Bernard De Baets of the Dept. of Applied Mathematics, Biometrics and Process Control, (at the University of Gent in Belgium), Didier Dubois (of IRIT, Université Paul Sabatier in Toulouse, France) and Eyke Hüllermeier (of the Dept. of Mathematics and Computer Science, Universität Marburg, Germany). The journal publishes 24 issues a year. Fuzzy Sets and Systems is abstracted and indexed by Scopus and the Science Citation Index. According to the Journal Citation Reports released in 2010, its 2-year impact factor calculated for 2009 is 2.138 and its 2010 5-year impact facto