Shamsuddin, Siti Mariyam, Anazida Zainal, and Norfadzila Mohd Yusof. 2008. “MULTILEVEL KOHONEN NETWORK LEARNING FOR CLUSTERING PROBLEMS”. Journal of Information and Communication Technology 7 (April):1-25. https://e-journal.uum.edu.my/index.php/jict/article/view/8075.