L. Findlater, und J. Mcgrenere. Proceedings of the SIGCHI Conference on Human Factors in Computing Systems, Seite 1247--1256. New York, NY, USA, ACM, (2008)
Y. Song, Z. Zhuang, H. Li, Q. Zhao, J. Li, W. Lee, und C. Giles. Proceedings of the 31st annual international ACM SIGIR conference on Research and development in information retrieval, Seite 515--522. New York, NY, USA, ACM, (2008)
M. Bilandzic, M. Foth, und A. De Luca. Proceedings of the 7th ACM Conference on Designing Interactive Systems, Seite 174--183. New York, NY, USA, ACM, (2008)