1. Alattar, A.M., 2004. Reversible watermark using difference expansion of quads. In: Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing, vol. 3, pp. 377–380.
2. Barton, J.M., 1997. Method and apparatus for embedding authentication information within digital data. United States Patent, 5 646 997, July 8, 1997.
3. Bausys, R., Kriukovas, A., 2006. Reversible watermarking scheme for image authentication in frequency domain. In: Proceedings of the 48th International Symposium ELMAR-2006 focused on Multimedia Signal Processing and Communications, pp. 53–56.
4. Celik, M.U., Sharma, G., Tekalp, A.M., Saber, E., 2002. Reversible data hiding. In: Proceedings of IEEE International Conference on Image Processing, vol. 2, pp. 157–160.
5. Chang, C.C., Tai, W.L., Lin, M.H., 2005. A reversible data hiding scheme with modified side match vector quantization. In: Proceedings of the 19th International Conference on Advanced Information Networking and Applications, vol. 1, pp. 947–952.