SOMRA, D.S; GUPTA, M. A Survey: Dual watermarking Techniques using 2 DWT, DCT & SVD. International Journal of Computer Sciences and Engineering, [S. l.], v. 6, n. 12, p. 633–641, 2018. DOI: 10.26438/ijcse/v6i12.633641. Disponível em: https://ijcse.isroset.org/index.php/j/article/view/3929. Acesso em: 2 feb. 2026.