@article{DBLP:journals/ws/LukasiewiczS07,
  title = "Variable-Strength Conditional Preferences for Ranking Objects in Ontologies",
  author = "Thomas Lukasiewicz and J\"{o}rg Schellhase",
  year = "2007",
  journal = "Journal of Web Semantics",
  month = "September",
  number = "3",
  pages = "180--194",
  url = "http://dx.doi.org/10.1016/j.websem.2007.06.001",
  volume = "5",
}