Puertpau, Rapee, and Thumrongrat Amornraksa. “Efficiency Improvement in Watermark Retrieval Process”. Engineering and Applied Science Research 28, no. 4 (March 6, 2013): 145–158. accessed August 31, 2026. https://ph01.tci-thaijo.org/index.php/easr/article/view/6733.