Poomhiran, L., P. Meesad, and S. Nuanmeesri. “Improving the Recognition Performance of Lip Reading Using the Concatenated Three Sequence Keyframe Image Technique”. Engineering, Technology & Applied Science Research 11, no. 2 (April 11, 2021): 6986–6992. Accessed May 1, 2024. https://etasr.com/index.php/ETASR/article/view/4102.