Nussbaumer, Alexander, Eva-Catherine Hillemann, Christian Gütl, and Dietrich Albert. “A Competence-Based Service for Supporting Self-Regulated Learning in Virtual Environments”. Journal of Learning Analytics 2, no. 1 (May 27, 2015): 101–133. Accessed September 10, 2024. https://learning-analytics.info/index.php/JLA/article/view/4130.