WASET
    Souvik Bhattacharyya and  Aparajita Khan and  Indradip Banerjee and  Gautam Sanyal,  A Robust Image Steganography Method Using PMM in Bit Plane Domain.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2014, vol. 93(9). 1712 - 1726
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/10000190.