Khalifa, I. A., S. R. Zeebaree, M. Ataş, and F. M. Khalifa. “Image Steganalysis in Frequency Domain Using Co-Occurrence Matrix and Bpnn”. Science Journal of University of Zakho, vol. 7, no. 1, Mar. 2019, pp. 27-32, doi:10.25271/sjuoz.2019.7.1.574.