Martinez-Maldonado, Roberto, Simon Buckingham Shum, Bertrand Schneider, Sven Charleer, Joris Klerkx, and Erik Duval. “Learning Analytics for Natural User Interfaces: A Framework, Case Studies and a Maturity Analysis”. Journal of Learning Analytics 4, no. 1 (March 14, 2017): 24–57. Accessed September 10, 2024. https://learning-analytics.info/index.php/JLA/article/view/5131.