@article{DBLP:journals/tocl/Lukasiewicz01,
  title = "Probabilistic Logic Programming with Conditional Constraints",
  author = "Thomas Lukasiewicz",
  year = "2001",
  journal = "ACM Transactions on Computational Logic (TOCL)",
  month = "July",
  number = "3",
  pages = "289--339",
  url = "http://doi.acm.org/10.1145/377978.377983",
  volume = "2",
}