L. S. Abdulraman, S. R. Hma Salah, H. S. Maghdid, and A. T. Sabir, “A robust way of steganography by using blocks of an image in spatial domain”, Innovaciencia, vol. 7, no. 1, pp. 1–7, Oct. 2019, doi: 10.15649/2346075X.690.