1999
- G.Voyatzis and I.Pitas, "Protecting digital image copyrights: a framework", IEEE Computer Graphics and Applications, vol. 19, no. 1, January-Febrary, 1999.
- G.Voyatzis and I.Pitas, "Problems and Challenges in Multimedia Networking and Content Protection", TICSP Series #3, Trends and Challenges, Contributions to Workshop on Trends and Important Challenges in Signal Processing, ed. Jaakko Astola, March, 1999.
- G.Voyatzis and I.Pitas, "The use of watermarks in the protection of digital multimedia products", Proceedings of the IEEE, vol. 87, no. 7, July, 1999.
1998
- G.Voyatzis and I.Pitas, "Digital Image Watermarking using Mixing Systems", omputer & Graphics, Elsevier, vol. 22, no. 4, pp. 405-416, 1998.
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