@ARTICLE{Hoffman2009,
    author = {Hoffman, Kevin and Zage, David and Nita-Rotaru, Cristina},
    title = {A survey of attack and defense techniques for reputation systems},
    journal = {ACM Comput. Surv.},
    year = {2009},
    volume = {42},
    pages = {1:1--1:31},
    month = {December},
    acmid = {1592452},
    address = {New York, NY, USA},
    articleno = {1},
    doi = {http://doi.acm.org/10.1145/1592451.1592452},
    issn = {0360-0300},
    issue = {1},
    keywords = {Reputation, attack mitigation, attacks, collusion, defense techniques, incentives, peer-to-peer, trust},
    numpages = {31},
    publisher = {ACM},
    url = {http://doi.acm.org/10.1145/1592451.1592452}
}