WASET
    Tirtha S. Das and  Ayan K. Sau and  Subir K. Sarkar,  Spread Spectrum Image Watermarking for Secured Multimedia Data Communication.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2007, vol. 6(6). 1659 - 1668
    [viewed 16 April 2024]. Available from: https://publications.waset.org/pdf/1840.