E. Chi, P. Pirolli, K. Chen, und J. Pitkow. Proceedings of the SIGCHI Conference on Human Factors in Computing Systems, Seite 490--497. New York, NY, USA, ACM, (2001)
D. Dimitrov, P. Singer, D. Helic, und M. Strohmaier. Proceedings of the 26th ACM Conference on Hypertext &\#38; Social Media, Seite 59--68. New York, NY, USA, ACM, (2015)