Idakwo, Monday Abutu, et al. “Development of a Non-Separable Integer-to-Integer Wavelet Transform-Based Digital Image Steganography System”. Applications of Modelling and Simulation, vol. 6, Jan. 2022, pp. 20-27, https://www.ojs.arqiipubl.com/index.php/AMS_Journal/article/view/317.