@InCollection{    bredix00,
  author    = {Gerhard Brewka and J\"{u}rgen Dix},
  title     = {Knowledge Representation with Extended Logic Programs},
  booktitle = {Handbook of Philosophical Logic, 2nd Edition, Volume 6,
          Methodologies},
  publisher = {Reidel Publ.},
  year      = {2004},
  editor    = {D. Gabbay and F. Guenthner},
  chapter   = {6},
  pages     = {},
  note      = {Shortened version also appeared in Dix, Pereira,
          Przymusinski (Eds.), \emph{Logic Programming and Knowledge
          Representation}, Springer LNAI 1471, pages 1--55, 1998.}
}