\begin{thebibliography}{1}

\bibitem{rfc2445}
F.~Dawson and D.~Stenerson, \htmladdnormallink{``{Internet} calendaring and
  scheduling core object specification
  (icalendar),''}{http://www.rfc-editor.org/rfc/rfc2445.txt} RFC 2445, Internet
  Engineering Task Force, Nov. 1998.

\bibitem{draft-ietf-calsch-many-xcal}
F.~D. Jr., S.~M. Reddy, D.~Royer, and E.~Plamondon,
  \htmladdnormallink{``icalendar {DTD} document
  (xcal),''}{http://www.ietf.org/internet-drafts/draft-ietf-calsch-many-xcal-0%
2.txt} internet draft, Internet Engineering Task Force, July 2002.
\newblock Work in progress.

\bibitem{draft-ietf-iptel-cpl}
J.~Lennox and H.~Schulzrinne, \htmladdnormallink{``{CPL:} a language for user
  control of {Internet} telephony
  services,''}{http://www.ietf.org/internet-drafts/draft-ietf-iptel-cpl-05.txt%
,http://www.ietf.org/internet-drafts/draft-ietf-iptel-cpl-05.ps} internet
  draft, Internet Engineering Task Force, Nov. 2001.
\newblock Work in progress.

\end{thebibliography}
