Angelo Di Iorio Davide Rossi Fabio Vitali Stefano Zacchiroli Where are your manners?: Sharing best community practices in the web 2.0. 681-687 2009 SAC http://doi.acm.org/10.1145/1529282.1529422 conf/sac/2009 db/conf/sac/sac2009.html#IorioRVZ09