Thomas Bocek, Wang Kun, Fabio Victora Hecht, David Hausheer, Burkhard Stiller: PSH: A Private and Shared History-based Incentive Mechanism; in: 2nd International Conference on Autonomous Infrastructure, Management and Security Resilient Networks and Services (AIMS), Bremen, Germany, July 2008, pp 1-25. URL: http://www.csg.uzh.ch/staff/bocek/publications/PSH_v5.pdf.