@inproceedings{de-la-rosa-et-al_aaai2006,
  author       = {De La Rosa, Tomás and Fuentetaja, Raquel},
  pages        = {87 -- 90},
  title        = {Integrating actions preconditions difficulty within the relaxed plan
    heuristic measure},
  year         = 2006,
  booktitle    = {Proceedings of the Twenty-First National Conference on Artificial
    Intelligence ({AAAI} 2006)},
  publisher    = {{AAAI} Press},
}