Tu, Le Anh, Nguyen Quang Hoan, and Le Son Thai. “Hierarchy Supervised SOM Neural Network Applied for Classification Problem”. <i>Journal of Computer Science and Cybernetics</i> 30, no. 3 (September 24, 2014): 278–290. Accessed November 5, 2025. https://jcc.vast.vn/jcc/article/view/4080.