Huấn, Hoàng Xuân, and Nguyễn Thị Xuân Hương. “An Extension of the K-Means Algorithm for Mixed Data”. Journal of Computer Science and Cybernetics 22, no. 3 (June 23, 2012): 267–274. Accessed May 2, 2024. https://vjs.ac.vn/index.php/jcc/article/view/1106.