Daungklang, Phummipat, and Prasong Praneetpolgrang. “QR Code Steganography for Communication in Royal Airforce: An Application”. NKRAFA JOURNAL OF SCIENCE AND TECHNOLOGY 18, no. 1 (June 30, 2022): 15–25. Accessed May 3, 2024. https://ph02.tci-thaijo.org/index.php/nkrafa-sct/article/view/243863.