Takuya Kobayashi Hiroaki Ohshima Satoshi Oyama Katsumi Tanaka Modeling and analyzing review information on the web focusing on credibility. 1316-1317 2009 SAC http://doi.acm.org/10.1145/1529282.1529577 conf/sac/2009 db/conf/sac/sac2009.html#KobayashiOOT09