\begin{thebibliography}{1}

\bibitem{r4rs}
Jonathan~A. Rees and William~Clinger{,} editors.
\newblock The revised$^4$ report on the algorithmic language {S}cheme.
\newblock {\em LISP Pointers}, IV(3):1--55, July--September 1992.

\end{thebibliography}
