@inproceedings{Backstrom92,
  title = {Equivalence and Tractability Results for SAS+ Planning},
  author = {Christer Bäckström},
  year = {1992},
  researchr = {https://researchr.org/publication/Backstrom92},
  cites = {0},
  citedby = {0},
  pages = {126-137},
  booktitle = {KR},
}