Papageorgiou, E., J. . Wong, M. . Khalil, and A. J. Cabo. “Nonlinear Effort-Time Dynamics of Student Engagement in a Web-Based Learning Platform: A Person-Oriented Transition Analysis”. Journal of Learning Analytics, vol. 12, no. 2, Aug. 2025, pp. 237-58, doi:10.18608/jla.2025.8663.