Random walk based entity ranking on graph for multidimensional recommendation. - Sangkeun Lee 001; Sang-il Song; Minsuk Kahng; Dongjoo Lee; Sang-goo Lee (RecSys, 2011)

Determining user expertise for improving recommendation performance. - Sang-il Song; Sangkeun Lee 001; Sungchan Park; Sang-goo Lee (ICUIMC, 2012)