TY - JOUR T1 - Identifying valuable customers on social network sites for profit maximization JF - Expert Systems with Applications Y1 - 2012 A1 - Xu,Kaiquan A1 - Li,Jiexun A1 - Song,Yuxia KW - BIS VL - 39 CP - 17 U2 - a U4 - 86816428032 ID - 86816428032 ER -