Zoltan Balogh, Mathematisches Institut, Universitat Bern, Switzerland

Martin Deraux, Institut Fourier, Universite de Grenoble I, France

Elisha Falbel, Institut de Mathematiques de Jussieu, Universite Paris 6, France

Shigeyasu Kamiya, Department of Mathematics, Okayama University of Science, Japan

John Parker, Department of Mathematical Sciences, University of Durham, UK

Ioannis Platis, Department of Mathematics, University of Crete, Greece

Pierre Will, Institut Fourier, Universite de Grenoble I, France