1. Ron Crandall: Some Notes on Steganography. Posted on Steganography Mailing List, 1998.
http://os.inf.tu-dresden.de/~westfeld/crandall.pdf
2. Andy C. Hung: PVRG-JPEG Codec 1.1, Stanford University, 1993.
http://archiv.leo.org/pub/comp/os/unix/graphics/jpeg/PVRG
3. Fabien Petitcolas: MP3Stego, 1998.
http://www.cl.cam.ac.uk/~fapp2/steganography/mp3stego
4. Derek Upham: Jsteg, 1997, e. g.
http://www.tiac.net/users/korejwa/jsteg.htm
5. Lect Notes Comput Sci;A. Westfeld,2000