P. Lessel, M. Müller, and A. Krüger. Proceedings of the 33rd Annual ACM Conference Extended Abstracts on Human Factors in Computing Systems (CHI EA '15), Seoul, Republic of Korea, page 1809--1814. New York, ACM, (2015)
B. Kirman, C. Linehan, S. Lawson, D. Foster, and M. Doughty. Proceedings of the ACM Conference Extended Abstracts on Human Factors in Computing Systems (CHI EA '10), Atlanta, GA, USA, page 2685--2694. (2010)
P. Joubert, and S. Roodt. Entertainment Computing -- ICEC 2009: 8th International Conference, Paris, France, volume 5709 of Lecture Notes in Computer Science, Springer, Berlin, (2009)