How Social Structure Improves Distributed Reputation Systems - Three Hypotheses. - Philipp Obreiter; Stefan Fähnrich; Jens Nimis (AP2PC, 2004)

The Buddy System: A Distributed Reputation System Based on Social Structure. - Stefan Fähnrich; Philipp Obreiter; Birgitta König-Ries (GI Jahrestagung (1), 2004)