B. Balaji, J. Koh, N. Weibel, and Y. Agarwal. Proceedings of the 2016 ACM International Joint Conference on Pervasive and Ubiquitous Computing, page 1200--1211. New York, NY, USA, ACM, (2016)
B. Weyers, W. Luther, N. Baloian, and J. Pino. Collaboration and Technology: 18th International Conference, CRIWG 2012, Raesfeld, Germany, volume 7493 of Lecture Notes in Computer Science, Springer, Heidelberg, (2012)