H. Tsang, A. Hanbidge, and T. Tin. Proceedings of the 23rd Western Canadian Conference on Computing Education, page 5:1--5:6. New York, NY, USA, ACM, (2018)
P. Hagen, T. Robertson, M. Kan, and K. Sadler. Proceedings of the 17th Australia conference on Computer-Human Interaction: Citizens Online: Considerations for Today and the Future, page 1--10. Canberra, Australia, Computer-Human Interaction Special Interest Group (CHISIG) of Australia, (2005)
Y. Nakhimovsky, D. Eckles, and J. Riegelsberger. Proceedings of the 27th international conference extended abstracts on Human factors in computing systems, page 4795--4798. Boston, MA, USA, ACM, (2009)