NADIA IDRISSI, and AHMED ROUKHE, (2014) Application of contourlet transform and maximum entropy on digital image watermarking. Journal of Theoretical and Applied Information Technology . Vol. 67 No.3 pp 637-643, 2014.

NADIA IDRISSI, and AHMED ROUKHE, and LHOUSSAINE MASMOUDI, and MOHAMED RADOUANE, and ROCHDI MESSOUSSI, (2013) A Robust digital watermarking technique using DWT-DCT and statics blocks. International journal of computer science issues, Vol. 10, Issue 2, p. 45,2013.