Peter Racz, Sergios Soursos, María Ángeles Callejo Rodriguez, Spiros Spirou, Fabio Hecht, Ioanna Papafili, George D. Stamoulis, Hasan Hasan, Burkhard Stiller: Economic Traffic Management for Overlay Networks; in: ICT-MobileSummit 2009, June 2009, URL: http://www.zora.uzh.ch/19495/2/ICTMobileSummit_Paper_ref_139_doc_2140.pdf.