@article{h-twpa-00,
  author    = {Sariel Har-Peled},
  title     = {Taking a Walk in a Planar Arrangement},
  journal   = {SIAM J. Comput.},
  volume    = {30},
  number    = {4},
  year      = {2000},
  pages     = {1341-1367},
  ee        = {http://dx.doi.org/10.1137/S0097539799362627}
}