
http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B94SX-4YYGYVP-1&_user=4205802&_coverDate=05%2F31%2F2010&_alid=1736102125&_rdoc=16&_fmt=high&_orig=search&_origin=search&_zone=rslt_list_item&_cdi=56450&_sort=r&_st=13&_docanchor=&view=c&_ct=69&_acct=C000062534&_version=1&_urlVersion=0&_userid=4205802&md5=c789d32e096ad4664d8984e52994b37b&searchtype=a
2、
Overcoming the J-shaped distribution of product reviews
http://portal.acm.org/citation.cfm?id=1562800
多谢



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