Khosravi, Hassan, Kirsty Kitto, and Joseph Jay Williams. “RiPPLE: A Crowdsourced Adaptive Platform for Recommendation of Learning Activities”. Journal of Learning Analytics 6, no. 3 (December 13, 2019): 91–105. Accessed April 30, 2026. https://www.learning-analytics.info/index.php/JLA/article/view/6373.