\begin{thebibliography}{1}

\bibitem{rfc2119}
S.~Bradner, \htmladdnormallink{``Key words for use in rfcs to indicate
  requirement levels,''}{http://www.rfc-editor.org/rfc/rfc2119.txt} RFC 2119,
  Internet Engineering Task Force, Mar. 1997.

\bibitem{Nati0302:Nena}
{National Emergency Number Association (N. E. NA) Migration Working Group of
  the Network Technical Committee}, ``{NENA} technical information document on
  the interface between the {E9-1-1} service providers network and the
  {Internet} protocol {(IP)} {PSAP},'' tech. rep., National Emergency Number
  Association (NENA), Coschocton, Ohio, Feb. 2003.

\bibitem{draft-ietf-geopriv-reqs}
J.~Cuellar, J.~Morris, and D.~Mulligan, \htmladdnormallink{``Geopriv
  requirements,''}{http://www.ietf.org/internet-drafts/draft-ietf-geopriv-reqs%
-02.txt} internet draft, Internet Engineering Task Force, Jan. 2003.
\newblock Work in progress.

\end{thebibliography}
