Asadolahzade Kermanshahi, Ma., akbari, ahmad, akbari, ahmad, akbari, ahmad, Akbari Azirani, A., Nasersharif, B.. “Proposing Two Data Augmentation Techniques for ASR with Limited Data: Gradual Masking and Word Frequency-Aware Masking.” Nashriyyah -i Muhandisi -i Barq va Muhandisi -i Kampyutar -i Iran, vol. 23, no. 4, 2026, pp. 233-245.