\begin{thebibliography}{10}

\bibitem{PSSupplement2017}
Adobe Systems Incorporated.
\newblock {\em {PostScript} Language Reference Manual Supplement for
  Version~2017}, April 1996.
\newblock Document ID: PN~LPS5217.

\bibitem{PPD4.3}
Adobe Systems Incorporated.
\newblock {\em {PostScript} Printer Description File Format Specification,
  Version~4.3}, February 1996.
\newblock Document ID: PN~LPS5003.

\bibitem{PSSupplement3010}
Adobe Systems Incorporated.
\newblock {\em Supplement: {PostScript} Language Reference Manual
  (LanguageLevel 3 Specification and {Adobe} {PostScript}~3 Version~3010
  Product Supplement)}, October 1997.
\newblock Document ID: 970028-006.

\bibitem{PostScript3}
{Adobe Systems Incorporated}.
\newblock {\em {PostScript} Language Reference}.
\newblock Addison-Wesley, Reading\slash Mas\-sa\-chu\-setts etc., 3rd edition,
  February 1999.
\newblock First printing.

\bibitem{PSSupplement3011}
Adobe Systems Incorporated.
\newblock {\em {PostScript} Language Reference Supplement: {Adobe}
  {PostScript}~3 Version~3010 and~3011 Product Supplement}, August 1999.
\newblock Document ID: 28-007.

\bibitem{Use5.50}
L.~Peter Deutsch.
\newblock {\em How to use Ghostscript}, September 1998.
\newblock File {\tt Use.htm} in ghostscript 5.50.

\bibitem{Drivers5.50}
L.~Peter Deutsch.
\newblock {\em The interface between Ghostscript and device drivers}, September
  1998.
\newblock File {\tt Drivers.htm} in ghostscript 5.50.

\bibitem{Language5.50}
L.~Peter Deutsch.
\newblock {\em The relationship between Ghostscript and {PostScript}},
  September 1998.
\newblock File {\tt Language.htm} in ghostscript 5.50.

\bibitem{Drivers6.01}
L.~Peter Deutsch.
\newblock {\em The interface between Ghostscript and device drivers}, February
  2000.
\newblock File {\tt Drivers.htm} in ghostscript 6.01.

\bibitem{hpdj}
Martin Lottermoser.
\newblock {\em hdpj: a Ghostscript Device Driver for PCL 3+}, October 1999.
\newblock Version 2.6. See {\tt ftp://ftp.sbs.de\slash pub\slash graphics\slash
  ghostscript\slash pcl3\slash pcl3.html}.

\bibitem{pcl3}
Martin Lottermoser.
\newblock {\em pcl3}, October 2000.
\newblock Version 3.0. See {\tt http://home.t-online.de\slash home\slash
  Martin.Lottermoser\slash pcl3.html}.

\end{thebibliography}