Rojczyk, Arkadiusz, and Andrzej Porzuczek. “Detection of Non-Native Speaker Status from Backwards and Vocoded Content-Masked Speech”. Theory and Practice of Second Language Acquisition 6, no. 2 (January 18, 2021): 87-105. Accessed April 30, 2024. https://www.journals.us.edu.pl/index.php/TAPSLA/article/view/7714.