1.
Evidence-Calibrated RAG for Unanswerable Question Answering: Retrieval Coverage, Abstention Calibration, and Hallucination-Proxy Analysis on SQuAD 2.0. JTIE [Internet]. 2025 Aug. 25 [cited 2026 Jul. 3];4(2):502-20. Available from: https://jtie.stekom.ac.id/index.php/jtie/article/view/536