Siraa Ben Ftima and  Mourad Talbi and  Tahar Ezzedine,  Lifting Wavelet Transform and Singular Values Decomposition for Secure Image Watermarking.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    July 2017, vol. 127(7). 884 - 889
    [viewed 18 May 2021]. Available from: https://publications.waset.org/pdf/10007783.