Zonyfar, Candra, Kiki Ahmad Baihaqi, and Annisa Bela Pertiwi. “Pixel Value Differencing and Modulus Function Method for Embedded Message in Digital Images”. International Journal of Psychosocial Rehabilitation 24, no. 1 (February 29, 2020): 8272–8278. Accessed July 31, 2025. https://www.psychosocial.com/index.php/ijpr/article/view/1220.