WASET
    Jyotsna Singh and  Parul Garg and  Alok Nath De,  Audio Watermarking Using Spectral Modifications.   journal   = {International Journal of Electronics and Communication Engineering}, [online]. World Academy of Science, Engineering and Technology.
    November 2009, vol. 35(11). 2207 - 2211
    [viewed 28 March 2024]. Available from: https://publications.waset.org/pdf/15858.