Christian Hütter 0001 Raphael Lorch Klemens Böhm Evolving Cooperation through Reciprocity Using a Centrality-Based Reputation System. 264-271 2011 IAT https://doi.org/10.1109/WI-IAT.2011.204 https://doi.ieeecomputersociety.org/10.1109/WI-IAT.2011.204 conf/iat/2011 db/conf/iat/iat2011.html#HutterLB11