Soldatova, Elena, Ursula Bach, Rene Vossen, and Sabina Jeschke. “E-Learning Recommender System for Teaching Staff of Engineering Disciplines”. International Journal of Engineering Pedagogy (iJEP) 4, no. 3 (June 12, 2014): pp. 42–47. Accessed January 17, 2022. https://online-journals.org/index.php/i-jep/article/view/3478.