T. C. Wei, M. H. Ahmad Hijazi, S. Alias, A. A. A. Ibrahim, and M. F. I. Othman, “Intelligent Course Recommender Chatbot Using Natural Language Processing”, Int. J. Adv. Sci. Eng. Inf. Technol., vol. 12, no. 5, pp. 1915–1920, Sep. 2022.