@article{Bloch:2010s1,
  author = "Bloch, Jacques  and  Heybrock, Simon",
  title = "{A nested Krylov subspace method for the overlap operator}",
  doi = "10.22323/1.091.0025",
  journal = "PoS",
  year = 2010,
  volume = "LAT2009",
  pages = "025"
}