\begin{thebibliography}{1}

\bibitem{rfc2543}
M.~Handley, H.~Schulzrinne, E.~Schooler, and J.~Rosenberg,
  \htmladdnormallink{``{SIP:} session initiation
  protocol,''}{http://www.rfc-editor.org/rfc/rfc2543.txt} RFC 2543, Internet
  Engineering Task Force, Mar. 1999.

\bibitem{draft-ietf-urn-ddds-toc}
M.~Mealling, \htmladdnormallink{``Dynamic delegation discovery system ({DDDS})
  part one: The comprehensive {DDDS}
  standard,''}{http://www.ietf.org/internet-drafts/draft-ietf-urn-ddds-toc-03.%
txt} {Internet Draft}, Internet Engineering Task Force, May 2002.
\newblock Work in progress.

\bibitem{draft-ietf-urn-dns-ddds-database}
M.~Mealling, \htmladdnormallink{``Dynamic delegation discovery system ({DDDS})
  part three: The {DNS}
  database,''}{http://www.ietf.org/internet-drafts/draft-ietf-urn-dns-ddds-dat%
abase-09.txt} {Internet Draft}, Internet Engineering Task Force, May 2002.
\newblock Work in progress.

\end{thebibliography}
