@inproceedings{ijcai2009p147,
  title     = {On First-Order Definability and Computability of Progression for Local-Effect Actions and Beyond},
  author    = {Liu, Yongmei and Lakemeyer, Gerhard},
  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     = {860--865},
  year      = {2009},
  url       = {https://ijcai.org/proceedings/2009/147},
}