AL-Bakri, Nadia Fadhil, and Soukaena Hassan Hashim. “Collaborative Filtering Recommendation Model Based on K-Means Clustering”. Al-Nahrain Journal of Science, vol. 22, no. 1, Mar. 2019, pp. 74-79, https://mail.anjs.edu.iq/index.php/anjs/article/view/2100.