BibTeX

@article{ThiWag14,
  author =       "Thierauf, Thomas and Wagner,Fabian",
  title =        "Reachability in $K_{3,3}$-free Graphs and  $K_5$-free Graphs is in Unambiguous Logspace",
  journal =      "Chicago Journal of Theoretical Computer Science",
  volume =       "2",
  year =         "2014"
}