Sebastian Möller Jan Krebber Alexander Raake Paula Smeele Martin Rajman Mirek Melichar Vincenzo Pallotta Gianna Tsakou Basilis Kladis Anestis Vovos Jettie Hoonhout Dietmar Schuchardt Nikos Fakotakis Todor Ganchev Ilyas Potamitis http://arxiv.org/abs/cs.HC/0410063 2004 CoRR cs.HC/0410063 db/journals/corr/corr0410.html#cs-HC-0410063 informal publication