Leon Van Der Torre, University of Luxembourg,Luxembourg Ivan Jos´e Varzinczak, Univ. Artois and CNRS, France Serena Villata, CNRS, France Renata Wassermann, University of S˜ao Paulo, Brasil Emil Weydert, University of Luxembourg, Luxembourg Stefan Woltran, Vienna University of Technology, Austria Jessica Zangari, Universit`a della Calabria, Italy Additional reviewers