Huiguang Liang Ransi Nilaksha De Silva Wei Tsang Ooi Mehul Motani Avatar mobility in user-created networked virtual worlds: measurements, analysis, and implications. 163-190 2009 45 Multimedia Tools Appl. 1-3 http://dx.doi.org/10.1007/s11042-009-0304-x db/journals/mta/mta45.html#LiangSOM09