@Proceedings{	  dixperprz98,
  title		= {{L}ogic {P}rogramming and {K}nowledge {R}epresentation},
  year		= {1998},
  editor	= {J. Dix and L. Pereira and T. Przymusinski},
  publisher	= {Springer},
  address	= {Berlin},
  series	= {LNAI 1471}
}