@article{Birk:20120L,
  author = "Birk, Sebastian  and  Frommer, Andreas",
  title = "{A CG method for multiple right hand sides and multiple shifts in lattice QCD calculations}",
  doi = "10.22323/1.139.0027",
  journal = "PoS",
  year = 2012,
  volume = "Lattice 2011",
  pages = "027"
}