Ching-Yung Lin Nan Cao Shixia Liu Spiros Papadimitriou Jimeng Sun Xifeng Yan SmallBlue: Social Network Analysis for Expertise Search and Collective Intelligence. 1483-1486 2009 ICDE http://dx.doi.org/10.1109/ICDE.2009.140 conf/icde/2009 db/conf/icde/icde2009.html#LinCLPSY09