Shaik K. Ayesha V. Masilamani A novel multi-purpose watermarking scheme using multiple watermarks. 88-103 2021 15 Int. J. Comput. Aided Eng. Technol. 1 https://doi.org/10.1504/IJCAET.2021.115949 db/journals/ijcaet/ijcaet15.html#AyeshaM21