@inproceedings{harabor-etal-sara11,
  author = "Daniel Harabor and Adi Botea and Phil Kilby",
  title = {{Path Symmetries in Undirected Uniform-cost Grids}},
  booktitle = "In Proceedings of the Ninth Symposium on Abstraction, Reformulation, and Approximation (SARA-11)",
  year = "2011",
  opt_pages = ""
}