@article{KonczakLinkeSchaub2006,
  author    = {Kathrin Konczak and Thomas Linke and Torsten H. Schaub},
  title     = {Graphs and colorings for answer set programming},
  doi       = {10.1017/S1471068405002528},
  url       = {http://www.cs.kuleuven.ac.be/~dtai/projects/ALP//TPLP/},
  year      = {2006},
}