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\bibitem[Berners-Lee et al. 1998]{BernersFielIrviMasi:1998:UnReId}
\abntrefinfo{Berners-Lee et al.}{BERNERS-LEE et al.}{1998}
{BERNERS-LEE, T.; FIELDING, R.; IRVINE, U.~C.; MASINTER, L. \textbf{Uniform
  Resource Identifiers (URI): Generic syntax}. Washington DC: The Internet
  Engineering Task Force (IETF), Aug. 1998.
40~p.
RFC 2396.
Dispon{\'\i}vel em: <\url{http://tools.ietf.org/html/rfc2396}>. Acesso em: 19
  ago. 2010.}


\bibitem[Crocker 1982]{Crocker:1982:StFoAR}
\abntrefinfo{Crocker}{CROCKER}{1982}
{CROCKER, D.~H. \textbf{Standard for the format of ARPA Internet messages}.
  Washington DC: The Internet Engineering Task Force (IETF), Aug. 1982.
47~p.
RFC 822.
Dispon{\'\i}vel em: <\url{http://tools.ietf.org/html/rfc822}>. Acesso em: 19
  ago. 2010.}


\bibitem[Crocker e Overell 2008]{CrockerOver:2008:AuBNSy}
\abntrefinfo{Crocker e Overell}{CROCKER; OVERELL}{2008}
{CROCKER, D.~H.; OVERELL, P. \textbf{Augmented BNF for Syntax Specifications:
  ABNF}. Washington DC: The Internet Engineering Task Force (IETF), Jan. 2008.
16~p.
RFC 5234.
Dispon{\'\i}vel em: <\url{http://tools.ietf.org/html/rfc5234}>. Acesso em: 19
  ago. 2010.}


\bibitem[Mockapetris 1987]{Mockapetris:1987:CoFa}
\abntrefinfo{Mockapetris}{MOCKAPETRIS}{1987}
{MOCKAPETRIS, P. \textbf{Domain names - concepts and facilities}. Washington
  DC: The Internet Engineering Task Force (IETF), Nov. 1987.
55~p.
RFC 1034.
Dispon{\'\i}vel em: <\url{http://tools.ietf.org/html/rfc1034}>. Acesso em: 19
  ago. 2010.}


\end{thebibliography}