@inproceedings{ijcai2009p277,
  title     = {Completeness and Optimality Preserving Reduction for Planning},
  author    = {Chen, Yixin and Yao, Guohui},
  booktitle = {Proceedings of the Twenty-First International Joint Conference on
               Artificial Intelligence, {IJCAI-09}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  editor    = {Hiroaki Kitano},
  pages     = {1659--1663},
  year      = {2009},
  url       = {https://ijcai.org/proceedings/2009/277},
}