\begin{thebibliography}{3}
\expandafter\ifx\csname natexlab\endcsname\relax\def\natexlab#1{#1}\fi
\expandafter\ifx\csname url\endcsname\relax
  \def\url#1{{\tt #1}}\fi

\bibitem[Gentleman(2003)]{HTMLVignette}
R.~Gentleman.
\newblock Howto: get pretty html output for my gene list.
\newblock {\em Bioconductor Vignettes}, 2003.
\newblock URL \url{http://www.bioconductor.org}.

\bibitem[Gentleman and Gentry(2002)]{PubMedRnews}
R.~Gentleman and J.~Gentry.
\newblock Querying pubmed.
\newblock {\em R News}, 2\penalty0 (2):\penalty0 28--31, June 2002.
\newblock URL \url{http://CRAN.R-project.org/doc/Rnews/}.

\bibitem[Gentry(2004)]{PubMedVignette}
J.~Gentry.
\newblock Howto: Automated querying of pubmed data.
\newblock {\em Bioconductor Vignettes}, 2004.
\newblock URL \url{http://www.bioconductor.org}.

\end{thebibliography}
