\begin{thebibliography}{1}

\bibitem{ieeeIT.bergmans74a}
Patrick~P. Bergmans.
\newblock A simple converse for broadcast channels with additive white
  {Gaussian} noise (corresp.).
\newblock {\em IEEE Trans. on Information Theory}, 20(2):279--280, March 1974.

\bibitem{ieeeIT.bergmans74}
Patrick~P. Bergmans and Thomas~M. Cover.
\newblock Cooperative broadcasting.
\newblock {\em IEEE Trans. on Information Theory}, 20(3):317--324, May 1974.

\bibitem{ieeeIT.cover72}
Thomas~M. Cover.
\newblock Broadcast channels.
\newblock {\em IEEE Trans. on Information Theory}, 18(1):2--14, January 1972.

\bibitem{isit.liu02}
Youjian Liu, Kim~N. Lau, Oscar~Y. Takeshita, and Michael~P. Fitz.
\newblock Optimal rate allocation for superposition coding in quasi-static
  fading channels.
\newblock {\em Proceedings of the IEEE International Symposium on Information
  Theory}, page 111, June 2002.

\bibitem{isit.shamai97}
Shlomo Shamai.
\newblock A broadcast strategy for the gaussian slowly fading channel.
\newblock {\em Proceedings of the IEEE International Symposium on Information
  Theory}, page 150, June 1997.

\bibitem{ieeeIT.tarokh99}
V.~Tarokh, H.~Jafarkhani, and A.R. Calderbank.
\newblock Space-time block codes from orthogonal designs.
\newblock {\em IEEE Trans. on Information Theory}, 45(5):1456--1467, July 1999.

\end{thebibliography}