@article{Sommer:2009Vd,
  author = "Sommer, Rainer",
  title = "{Efficient use of the Generalised Eigenvalue Problem }",
  doi = "10.22323/1.066.0135",
  journal = "PoS",
  year = 2009,
  volume = "LATTICE 2008",
  pages = "135"
}