@inproceedings{ijcai2013p335,
  title     = {An Admissible Heuristic for SAS+ Planning Obtained from the State Equation},
  author    = {Bonet, Blai},
  booktitle = {Proceedings of the Twenty-Third International Joint Conference on
               Artificial Intelligence, {IJCAI-13}},
  publisher = {AAAI Press / International Joint Conferences on Artificial Intelligence},
  editor    = {Francesca Rossi},
  pages     = {2268--2273},
  year      = {2013},
  month     = {8},
  url       = {https://ijcai.org/proceedings/2013/335},
}