@Misc{gekakasc11b,
  author =	 "M. Gebser and R. Kaminski and B. Kaufmann and T. Schaub",
  title =	 "Multi-Criteria Optimization in {ASP} and its Application
                  to {L}inux Package Configuration",
  howpublished = "Unpublished draft",
  year =	 2011,
  note =	 "Available at
                  \texttt{http://www.cs.uni-potsdam.de/wv/pdfformat/gekakasc11b.pdf}"
}