@Article{kolisc06a,
  author = 	 "K. Konczak and T. Linke and T. Schaub",
  title = 	 "Graphs and colorings for answer set programming",
  journal = 	 "Theory and Practice of Logic Programming",
  year = 	 2006,
  volume = 	 6,
  number = 	 "1-2",
  pages = 	 "1-46"
}