Dimitar Taskovski and  Sofija Bogdanova and  Momcilo Bogdanov,  Blind Low Frequency Watermarking Method.   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
    August 2008, vol. 20(8). 1720 - 1724
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/8605.