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%%  Beispiel 11-02-1 auf Seite 564.
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Was \cite[S.\,12]{levy:2001} zeigt, sieht man in \cite{anbar:j_dent_res:1974}
noch einmal besser formuliert.
\begin{thebibliography}{ABC}
\bibitem[Levy]{levy:2001}
 Steven Levy: \emph{Hackers: Heroes of the Computer Revolution}, New York:
 Penguin Books, 2001.
\bibitem{anbar:j_dent_res:1974} Marcus Anbar, Fred Farley:
 \emph{Potential use of organic polyphosphonates as adhesives
 in the restoration of teeth}, J Dent Res 53, 879--888, 1974.
\end{thebibliography}
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