Rainer Klages - Queen Mary, University of London, School of Mathematical Sciences, Mile End Road, London E1 4NS London, United Kingdom
Günter Radons - Chemnitz University of Technology, Institute of Physics, 09107 Chemnitz, Germany
Igor M. Sokolov - Humboldt Universität zu Berlin, Institute of Physics, Newtonstr. 15, 12489 Berlin, Germany