H. Tsang, A. Hanbidge, und T. Tin. Proceedings of the 23rd Western Canadian Conference on Computing Education, Seite 5:1--5:6. New York, NY, USA, ACM, (2018)
B. Vogel, D. Spikol, A. Kurti, und M. Milrad. Proceedings of the 2010 6th IEEE International Conference on Wireless, Mobile, and Ubiquitous Technologies in Education, Seite 65--72. Washington, DC, USA, IEEE Computer Society, (2010)