1. Theory of codes;Berstel,1985
2. On uniquely decipherable codes with two codewords;Book;IEEE Trans. Comput.,1980
3. A device for quantizing, grouping, and coding amplitude modulated pulses;Kraft,1949
4. Algebraic combinatorics on words;Lothaire,2002
5. Two inequalities implied by unique decipherability;McMillan;IEEE Trans. Inform. Theory,1956