@inproceedings{ijcai1989p149,
  title     = {Ordering Problem Subgoals},
  author    = {Cheng, Jie and Irani, Keki B.},
  booktitle = {Proceedings of the Eleventh International Joint Conference on
               Artificial Intelligence, {IJCAI-89}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  editor    = {N. S. Sridharan},
  pages     = {931--935},
  year      = {1989},
  month     = {8},
  note      = {Planning, Scheduling, Reasoning About Actions},
  url       = {https://ijcai.org/proceedings/1989/149},
}