Hashim , H. F. ., M. . Jemel, and N. B. . Azzouna. “Optimization of Multiple Scaling Factors for ECG Steganography Using Dynamic Thresholding GA”. International Journal of Intelligent Systems and Applications in Engineering, vol. 11, no. 4, Sept. 2023, pp. 01-10, https://ijisae.org/index.php/IJISAE/article/view/3448.