Sameephet, Banchakarn, Kornwipa Poonpon, Nuanchan Pradutshon, and Wirapong Chansanam. “Automated Vocabulary Profiling of TOEIC Listening Materials: A CEFR-Aligned Approach for EFL Learners”. HighTech and Innovation Journal 6, no. 3 (September 1, 2025): 991–1012. Accessed November 6, 2025. https://hightechjournal.org/index.php/HIJ/article/view/1192.