Kovanovic, Vitomir, Dragan Gašević, Shane Dawson, Srećko Joksimovic, and Ryan Baker. “Does Time-on-Task Estimation Matter? Implications on Validity of Learning Analytics Findings”. Journal of Learning Analytics 2, no. 3 (February 18, 2016): 81-110. Accessed February 6, 2023. https://www.learning-analytics.info/index.php/JLA/article/view/4501.