1. [1] http://www.digitalwatermarkingalliance.org/app_mobile.asp
2. [2] http://www.dnp.co.jp/news/10009972_2482.html
3. [3] http://www.digimarc.com/home
4. [4] S. Katzenbeisser and F. A. P. Petitcolas: Information Hiding Techniques for Steganography and Digital Watermarking, Artech House, pp. 101-102, 2000.
5. [5] S. Katzenbeisser and F. A. P. Petitcolas: Information Hiding Techniques for Steganography and Digital Watermarking, Artech House, pp. 125-132, 2000.