Raditya Mayesha Beldyq, and Rika Apriani. “Sistem Chatbot Informasi PPDB Berbasis TF-IDF Dan Cosine Similarity Menggunakan Adaptive Threshold Pada Web Sekolah”. CHAIN: Journal of Computer Technology, Computer Engineering, and Informatics 4, no. 4 (October 1, 2026): 453-464. Accessed August 8, 2026. https://ejournal.techcart-press.com/index.php/chain/article/view/349.