1. Broadcast channels
2. Bergmans P. P. (1972) Random coding theorem for broadcast channels with degraded components. Presented at the 1972 IEEE International Symposium on Information Theory at Asilomar, California.
3. Ahlswede R. (1971) On two-way communication channels and a problem by Zarankiewicz. Presented at the Sixth Prague Conference on Information Theory, Statistical Decision Functions, and Random Processes.
4. Ahlswede R. (1971) Multi-way communication channels Presented at the Second International Symposium on Information Theory at Tsahkadsor, Armenian S. S. R. To appear in Problems of Control and Information.
5. Three-terminal communication channels