\begin{thebibliography}{1}

\bibitem{ho:mp1}
J.~D. Hobby.
\newblock A {\MF}-like system with {P}ost{S}cript output.
\newblock {\em Tugboat, the\/ {\TeX} User's Group Newsletter}, 10(4):505--512,
  December 1989.

\bibitem{ke:pic}
Brian~W. Kernighan.
\newblock Pic---a graphics language for typesetting.
\newblock In {\em Unix Research System Papers, Tenth Edition}, pages 53--77.
  AT\&T Bell Laboratories, 1990.

\bibitem{kn:c}
D.~E. Knuth.
\newblock {\em Computers and Typesetting}, volume~C.
\newblock Addison Wesley, Reading, Massachusetts, 1986.

\bibitem{kn:d}
D.~E. Knuth.
\newblock {\em Computers and Typesetting}, volume~D.
\newblock Addison Wesley, Reading, Massachusetts, 1986.

\end{thebibliography}