1. Biglieri, E.: ‘Introduction to trellis-coded modulation with applications’, et al. (Macmillan New York 1991)
2. Blahut, R.E.: ‘Principles and practice of information theory’, (Addison-Wesley Reading Massachusetts 1987)
3. Multilevel codes and multistage decoding
4. J. Huber. ‘Multilevel codes: Distance profiles and channel capacity’ In preparation