1. LAME Ain’t an MP3 Encoder. 〈http://lame.sourceforge.net/〉. Last checked on March 11, 2010.
2. Opera software by Opticom. 〈http://www.opticom.de/products/opera.html〉. Last checked on March 11, 2010.
3. N. Cvejic, T. Seppanen (Eds.), Digital Audio Watermarking Techniques and Technologies: Applications and Benchmarks, IGI Global, Information Science Reference, Hershey, New York, USA, 2007.
4. J. Dittmann, D. Megías, A. Lang, J. Herrera-Joancomartí, Theoretical framework for a practical evaluation and comparison of audio watermarking schemes in the triangle of robustness, transparency and capacity, Transactions on Data Hiding and Multimedia Security, in: Lecture Notes in Computer Science, vol. 4300, October 2006, pp. 1–40.
5. EBU. SQAM—Sound Quality Assessment Material, 2001. 〈http://140.130.175.70/html/mpeg4/sound.media.mit.edu/mpeg4/audio/sqam/index.html〉. Last checked on March 11, 2010.