Hiroshi Sato. An outer bound to the capacity region of broadcast channels (Corresp.). IEEE Transactions on Information Theory, 24(3):374-377, 1978. [doi]
@article{Sato78,
title = {An outer bound to the capacity region of broadcast channels (Corresp.)},
author = {Hiroshi Sato},
year = {1978},
doi = {10.1109/TIT.1978.1055883},
url = {http://dx.doi.org/10.1109/TIT.1978.1055883},
researchr = {https://researchr.org/publication/Sato78},
cites = {0},
citedby = {0},
journal = {IEEE Transactions on Information Theory},
volume = {24},
number = {3},
pages = {374-377},
}