Xing, Xinyu; Liang, Yu-Li; Cheng, Hanqiang; et al. (January 2011). SafeVchat: Detecting Obscene Content and Misbehaving Users in Online Video Chat Services (Report). University of Colorado at Boulder, Department of Computer Science. pp. 1–11. arXiv:1101.3124. Technical Report CU-CS-1077-11.