@inproceedings{aghighi-et-al-aaai2015,
  author       = {Meysam Aghighi and Peter Jonsson and Simon St{\aa}hlberg},
  title        = {Tractable Cost-Optimal Planning Over Restricted Polytree Causal Graphs},
  pages        = {3225--3231},
  editor       = {Blai Bonet and Sven Koenig},
  booktitle    = {Proceedings of the Twenty-Ninth {AAAI} Conference on Artificial
    Intelligence ({AAAI} 2015)},
  publisher    = {{AAAI} Press},
  year         = 2015,
}