@inproceedings{ijcai2009p289,
  title     = {Trees of Shortest Paths vs. Steiner Trees: Understanding and Improving Delete Relaxation Heuristics},
  author    = {Keyder, Emil and Geffner, Hector},
  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     = {1734--1738},
  year      = {2009},
  url       = {https://ijcai.org/proceedings/2009/289},
}