1. Code and parse trees for lossless source encoding;Abrahams;Comm. Inform. Systems,2001
2. Text Compression;Bell,1990
3. (S,C)-Dense Coding: An optimized compression code for natural language text databases;Brisaboa,2003
4. A note on D-ary Huffman codes;Capocelli;IEEE Trans. Inform. Theory,1991
5. R. de Prisco, A. de Santis, On lower bounds for the redundancy of optimal codes, in: Proc. Data Compression Conference, 1998