Muñoz-Ramírez, D. O., V. Ponomaryov, R. Reyes-Reyes, C. Cruz-Ramos, and S. N. Sadovnychiy. “Embedding a Color Watermark into DC Coefficients of DCT from Digital Images”. IEEE Latin America Transactions, vol. 17, no. 8, Dec. 2019, pp. 1326-34, https://latamt.ieeer9.org/index.php/transactions/article/view/1263.