Analyzing crowd workers in mobile pay-for-answer q&a. - Uichin Lee; Jihyoung Kim; Eunhee Yi; Juyup Sung; Mario Gerla (CHI, 2013)

Booming Up the Long Tails: Discovering Potentially Contributive Users in Community-Based Question Answering Services. - Juyup Sung; Jae-Gil Lee 001; Uichin Lee (ICWSM, 2013)

The Influence in Twitter: Are They Really Influenced? - Juyup Sung; Seunghyeon Moon; Jae-Gil Lee 001 (BSI@PAKDD/BSIC@IJCAI, 2013)