1. J. Abrahams, Code and parse trees for lossless source encoding, in Compression and Complexity of Sequences 1997, B.C. et al., ed., IEEE Computer Society, 1998, pp. 145–171.
2. R.L. Adler, D. Coppersmith, and M. Hassner, Algorithms for sliding block codes, IEEE Trans. Inform. Theory, IT-29 (1983), pp. 5–22.
3. R. Ahlswede, B. Balkenhol, and L. Khachatrian, Some properties of fix-free codes, Tech. Rep. 039, University Bielefeld, 1997.
4. M. Aigner and G.M. Ziegler, Proofs from The Book, Springer-Verlag, 1998.
5. F. Bassino, Generating functions of circular codes, Adv. in Appl. Math, 22 (1999), pp.1–24.