S. . Anggai, R. M. Zain, T. Tukiyat, and A. A. . Waskita, “Enhancing BERTopic with Neural Network Clustering for Thematic Analysis of U.S. Presidential Speeches”, J. Tek. Inform. (JUTIF), vol. 6, no. 4, pp. 1957–1970, Aug. 2025.