@article{Usui:2011Qn,
  author = "Usui, Kouta  and  Kikukawa, Yoshio",
  title = "{Reflection positivity of the free overlap fermions.}",
  doi = "10.22323/1.105.0267",
  journal = "PoS",
  year = 2011,
  volume = "Lattice 2010",
  pages = "267"
}