Abbas El Gamal. The feedback capacity of degraded broadcast channels (Corresp.). IEEE Transactions on Information Theory, 24(3):379-381, 1978. [doi]
@article{Gamal78, title = {The feedback capacity of degraded broadcast channels (Corresp.)}, author = {Abbas El Gamal}, year = {1978}, doi = {10.1109/TIT.1978.1055885}, url = {http://dx.doi.org/10.1109/TIT.1978.1055885}, researchr = {https://researchr.org/publication/Gamal78}, cites = {0}, citedby = {0}, journal = {IEEE Transactions on Information Theory}, volume = {24}, number = {3}, pages = {379-381}, }