1. Xu, G., & Tan, T. (2012). Survey of research on image halftone algorithm. Computer Engineering and Science., 34(12), 87–97.
2. Huang, L., & Duan, H. (2004). Research on progress in new digital screening technology. Packaging Engineering, 25(5), 24–26.
3. Bula, O., Sharma, G., & Monga, V. (2010). Orientation modulation for data hiding in clustered-dot halftone prints. IEEE Transactions on Image Processing, 2070–2840
4. Fu, M., & Au, O. (2012). Data hiding watermarking for halftone images. IEEE Transaction on Image Processing, 11(4), 477–484.
5. Rosen, J., & Javidi, B. (2001). Hiding images in halftone pictures. Applied Optics, 40(26), 3346–3353.