Christian Y. Sy. (2024) “Unsupervised Machine Learning Approaches in NLP: A Comparative Study of Topic Modeling with BERTopic and LDA”, International Journal of Intelligent Systems and Applications in Engineering, 12(21s), pp. 3276 –. Available at: https://mail.ijisae.org/index.php/IJISAE/article/view/6018 (Accessed: 8 April 2026).