@inproceedings{ijcai1993p199,
  title     = {Plan Modification versus Plan Generation: A Complexity-Theoretic Perspective},
  author    = {Nebel, Bernhard and Koehler, Jana},
  booktitle = {Proceedings of the Thirteenth International Joint Conference on
               Artificial Intelligence, {IJCAI-93}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  editor    = {Ruzena Bajcsy},
  pages     = {1436--1443},
  year      = {1993},
  note      = {Planning},
  url       = {https://ijcai.org/proceedings/1993/199},
}