\begin{thebibliography}{Draxler, 1991}

\bibitem[Draxler, 1991]{Draxler:ALPUK91}
C.~Draxler.
\newblock Accessing relational and {$NF^2$} databases through database set
  predicates.
\newblock In Geraint~A. Wiggins, Chris Mellish, and Tim Duncan, editors, {\em
  {ALPUK91}: Proceedings of the 3rd {UK} Annual Conference on Logic
  Programming, Edinburgh 1991}, Workshops in Computing, pages 156--173.
  Springer-Verlag, 1991.

\end{thebibliography}