Investigating Retrieval-Augmented Generation in Quranic Studies: A Study of 13 Open-Source Large Language Models. - Zahra Khalila; Arbi Haza Nasution; Winda Monika; Aytug Onan; Yohei Murakami; Yasir Bin Ismail Radi; Noor Mohammad Osmani (CoRR, 2025)