\begin{thebibliography}{1}

\bibitem{purrr-website}
Purrr, 2007.

\bibitem{kelsey-prescheme}
{\sc Kelsey, R.}
\newblock Pre-scheme: A scheme dialect for systems programming.

\bibitem{brood}
{\sc Schouten, T.}
\newblock Brood, 2007.

\end{thebibliography}
